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INVESTIGATIONS

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

Colour

Locality

Info

nx min

nx max

ny min

ny max

nz min

nz max

Spectrum

UVS

UVL

Reference

Chrysoberyl

1.739

1.748

0.008

0.009

3.679

3.705

Colourless

Sri Lanka

 

1.739

1.742

 

 

1.747

1.748

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2004 Mar, p33-37

Chrysoberyl

1.74

1.75

0.008

0.01

3.7

3.71

yellowish green, green

Ilakaka, Madagascar

 

1.740

1.740

 

 

1.748

1.750

typical Fe³+

 

 

Gems & Gemology 2002 fall p 261

Chrysoberyl - Alexandrite

1.74

1.763

0.009

0.01

3.7

3.78

 

Hematita, Minas Gerais, Brazil

 

1.740

1.752

 

 

1.750

1.763

Cr

weak red

weak to moderate red

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1987 Nr 3/4 p121-131

Chrysoberyl

1.74

1.749

0.009

0.009

3.71

3.71

colourless

Mogok, Birma

 

 

 

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2004 Sep, p63

Chrysoberyl

1.74

1.749

0.009

0.009

 

 

mint green

Tundura-Songea, Tanzania

10 ct, coloured by V³+

 

 

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1997 Jun, p63

Chrysoberyl

1.74

1.749

0.009

0.009

3.69

3.69

highly saturated green

Mali

4.29ct, Vanadium-Bearing

 

 

 

 

 

 

440 nm cutoff

inert

inert

Gems & Gemology 2003 Summer,p144

Chrysoberyl

1.741

1.75

0.009

0.009

3.71

3.71

colourless

Sri Lanka

 

 

 

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1999 Jul p106

Chrysoberyl

1.741

1.75

0.009

0.009

3.72

3.72

greenish brown

Sri Lanka

 

 

 

 

 

 

 

violet absorption

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1998 Sep, p169

Chrysoberyl

1.741

1.749

0.008

0.008

 

 

dark green

Tunduru, Tanzania

3.65ct, colored by vanadium

 

 

 

 

 

 

a band at 600 nm

inert

inert

Gems & Gemology 1998 Fall, p212-213

Chrysoberyl

1.742

1.751

0.008

0.009

3.71

3.72

mint green

Tanzania

vanadium bearing

 

 

 

 

 

 

440-445nm band

inert to faint yellow

inert to faint orange

Gems & Gemology 1996 fall p215-216

Chrysoberyl

1.742

1.757

0.008

0.015

3.71

3.73

brown, brownish-green, greenish yellow

Elahera, Sri Lanka

 

1.742

1.742

1.748

1.748

1.757

1.757

504, 495, 485, 445 (strong)

inert

inert

Gems & Gemology 1986 Summer, p91

Chrysoberyl - Alexandrite

1.742

1.751

0.009

0.009

3.64

3.64

 

Franquiera, Spain

 

1.742

1.742

1.746

1.746

1.751

1.751

 

 

 

The Journal of Gemmology 1997 Vol 25, N°5, p340-357

Chrysoberyl - Alexandrite

1.742

1.759

0.007

0.008

3.68

3.72

change colour from blue-green to reddish violet and orangy red

Minaçu, Goias, Brazil

 

1.742

1.752

1.744

1.754

1.748

1.759

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2010 59/3-4, p71-81

Chrysoberyl - Alexandrite

1.743

1.755

0.008

0.009

3.72

3.74

colour change: bluish-green to violet-red

Serra Dourada, Minacu, Brazil

translucent

1.743

1.746

1.746

1.748

1.751

1.755

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1997 Sep, p125

Chrysoberyl - Alexandrite

1.743

1.749

0.006

0.006

3.71

3.71

bluish green, colour-change

 

3.43ct

 

 

 

 

 

 

broad absorption below 450nm and between 550-580, lines at 478, 652, 657,6 82

inert

inert

GIA Gem Database  33805

Chrysoberyl

1.743

1.754

0.011

0.011

3.72

3.72

light green

 

1.97 ct

1.743

1.743

1.748

1.748

1.754

1.754

 

weak yellow

inert

ACAM lab  3741

Chrysoberyl

1.744

1.749

0.008

0.009

3.7

3.72

yellow to yellowish-green and yellowish-brown

Madagascar

 

1.744

1.749

1.747

1.752

1.752

1.758

 

 

 

The Journal of Gemmology 2001 Vol27, N°7,p385-394

Chrysoberyl

1.744

1.751

0.007

0.007

3.76

3.76

yellow

 

3.34 ct

1.744

1.744

1.748

1.748

1.751

1.751

 

inert

inert

ACAM lab  2048

Chrysoberyl

1.744

1.752

0.008

0.008

3.55

3.55

grayish-yellowish-green (mint-green)

Tanzania

0.71ct

 

 

 

 

 

 

 

inert

inert

http://www.spec4gem.info/index.php 2016

Chrysoberyl - Alexandrite

1.745

1.755

0.01

0.01

3.7

3.72

 

Elahera, Sri Lanka

 

1.745

1.745

1.749

1.749

1.755

1.755

680, 678, 665, 655, 649, 640 to 560, 473, 468

weak reddish

weak reddish

Gems & Gemology 1986 Summer, p91

Chrysoberyl - Alexandrite

1.745

1.754

0.008

0.01

3.71

3.71

 

Lake Manyare, Tanzania

 

1.745

1.745

1.750

1.750

1.754

1.754

 

weak yellowish

medium dull red

Gems & Gemology 1976 Fall, p203-209

Chrysoberyl - Alexandrite

1.745

1.77

0.008

0.011

3.65

3.77

 

Novello deposit, Masvingo District, Zimbabwe

 

1.745

1.759

1.748

1.763

1.753

1.770

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1967 Heft 61, p33-49

Chrysoberyl - Alexandrite

1.745

1.751

0.006

0.006

3.72

3.72

green-blue, colour-change

Hematita Mine, Nova Era, Minas Gerais, Brazil

2.68ct

 

 

 

 

 

 

broad absorption below 450nm and between 560-600, lines at 473, 478, 645, 655, 678, 680

inert

weak red

GIA Gem Database  34313

Chrysoberyl - Alexandrite

1.745

1.753

0.008

0.008

3.82

3.82

green, colour change

 

0.61ct

1.745

1.745

1.748

1.748

1.753

1.753

 

light red

red

ACAM lab  2071

Chrysoberyl

1.748

1.755

0.007

0.007

3.72

3.72

yellowish orange

Ratnapura, Sabaragamuwa, Sri Lanka

10.15ct

 

 

 

 

 

 

broad absorption below 520nm and  between 434-450 nm

inert

inert

GIA Gem Database  34792

Chrysoberyl - Alexandrite

1.749

1.759

0.01

0.01

3.644

3.663

purplish red and bluish green

Tokovaia, Ural Mts, Russia

 

1.749

1.749

1.753

1.753

1.759

1.759

 

 

 

The Journal of Gemmology 1997 Vol 25, N°5, p354

Chrysoberyl

1.751

1.759

0.008

0.008

3.75

3.75

greenish yellow

Ratnapura, Sabaragamuwa, Sri Lanka

5.25ct

 

 

 

 

 

 

broad absorption below 520nm and  between 435-460 nm

inert

inert

GIA Gem Database  34794

Chrysoberyl

1.756

1.768

0.012

0.012

3.74

3.74

yellowish green

 

 

1.756

1.756

1.761

1.761

1.768

1.768

broad band from 425 to 458 nm

inert

inert

The Australian Gemmologist 1984 Vol 15, N°7, p241-242

Chrysoberyl

1.759

1.769

0.01

0.01

 

 

greenish yellow

Malawi

0.80 and 1.05ct

 

 

 

 

 

 

 

 

 

Gems & Gemology 2001 Winter, p 319

Chrysoberyl

1.76

1.771

0.011

0.011

3.75

3.75

greenish brown

Sri Lanka

 

 

 

 

 

 

 

violet absorption

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1998 Sep, p169

Chrysoberyl

1.765

1.778

0.013

0.013

3.72

3.72

green

 

 

1.765 

1.772 

 

 

1.772 

1.778 

 

 

 

The Journal of Gemmology 1978 N°4, p229-231

Chrysoberyl

1.77

 

 

 

3.75

3.75

 

 

iron-rich chrysoberyl cat’s-eye, 9.90 wt.% Fe2O3

 

 

 

 

 

 

 

 

 

Journal of the Gemmological Society of Japan 1994 Vol19, p31-32

Chrysoberyl

1.78

1.793

0.013

0.013

3.81

3.81

slightly yellowish green

 

4.85ct cabochon, cat's-eye, extremely high RI and SG caused by high Fe content

 

 

 

 

 

 

 

inert

inert

Gems & Gemology 2001 Winter, p319

Chrysoberyl

 

 

 

 

3.72

3.72

yellow-green

Ratnapura, Sabaragamuwa, Sri Lanka

16.02, cabochon, cat's eye

 

 

 

 

 

 

broad absorption below 460nm

inert

inert

GIA Gem Database  34800

 

TABLES

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

nx min

 nx max

ny min

ny max

nz min

nz max

Reference

Chrysoberyl

1.739

1.77

0.007

0.011

3.71

3.76

1.739

1.760

1.742

1.764

1.748

1.770

Gemmological Tables, Ulrich Henn, 2004 

Chrysoberyl - Alexandrite

1.739

1.759

0.008

0.011

3.64

3.8

1.739

1.749

1.748

1.753

1.749

1.759

http://www.geminterest.com 

Chrysoberyl

1.739

1.76

0.007

0.011

3.71

3.75

 

 

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 2008 

Chrysoberyl

1.739

1.77

0.007

0.012

3.68

3.8

1.739

1.759

1.742

1.764

1.748

1.770

Tables of Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 

Chrysoberyl

1.74

1.77

0.007

0.012

3.5

3.84

1.740

1.759

 

 

1.745

1.770

Gemme, Dati per l'identificazione, P. De Stefano et al, 1993 

Chrysoberyl

1.74

1.77

0.008

0.012

3.68

3.8

 

 

 

 

 

 

http://www.gemmology.be 

Chrysoberyl

1.74

1.77

0.007

0.012

3.68

3.8

1.740

1.765

1.747

1.772

1.745

1.770

http://www.geminterest.com 

Chrysoberyl

1.74

1.77

0.008

0.012

3.68

3.8

1.740

1.759

1.747

1.764

1.745

1.770

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Chrysoberyl - Alexandrite

1.74

1.75

0.008

0.01

3.71

3.75

 

 

 

 

 

 

Gemology Tools Professional 2010

Chrysoberyl

1.74

1.759

0.008

0.01

3.71

3.75

 

 

 

 

 

 

Gemology Tools Professional 2010

Chrysoberyl

1.74

1.775

0.007

0.012

3.66

3.82

 

 

 

 

 

 

Gemmo.eu 

Chrysoberyl

1.742

1.76

0.008

0.01

3.7

3.75

1.742

1.750

 

 

1.750

1.760

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Chrysoberyl - Alexandrite

1.745

1.759

0.009

0.01

3.64

3.8

 

 

 

 

 

 

http://www.gemmology.be 

Chrysoberyl - Alexandrite

1.745

1.759

0.009

0.01

 

 

1.745

1.749

1.748

1.753

1.755

1.759

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Chrysoberyl

1.745

1.76

0.008

0.01

3.68

3.8

 

 

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Chrysoberyl - Alexandrite

1.746

1.76

0.007

0.011

3.71

3.75

 

 

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Chrysoberyl

1.75

1.76

0.008

0.01

3.71

3.72

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Chrysoberyl

yellow

Fe³+ in octahedral coordination

Gems & Gemology Summer 1988

Chrysoberyl - Alexandrite

colour-change

Cr³+ in octahedral coordination

Gems & Gemology Summer 1988

 

MINERAL INCLUSIONS

Inclusion

Stone

Reference

actinolite

Chrysoberyl - Alexandrite

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

actinolite

Chrysoberyl

Gubelin, Photoatlas Vol 2 (2005); The Australian Gemmologist 1987 May p 217-220

alabandite

Chrysoberyl

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

albite

Chrysoberyl

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

amphibole

Chrysoberyl - Alexandrite

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

andalusite

Chrysoberyl

The Australian Gemmologist 1987 May p 217-220

anorthite

Chrysoberyl

The Australian Gemmologist 1987 May p 217-220

anthophyllite

Chrysoberyl

The Australian Gemmologist 1987 May p 217-220

apatite

Chrysoberyl

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

apatite

Chrysoberyl - Alexandrite

Gemmological Tables, Ulrich Henn , GGA, 2004

biotite

Chrysoberyl - Alexandrite

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

brucite

Chrysoberyl - Alexandrite

The Journal of Gemmology 1995,24,8, p577

calcite

Chrysoberyl

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

calcite

Chrysoberyl - Alexandrite

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

chlorite

Chrysoberyl

The Australian Gemmologist 1987 May p 217-220

chlorite

Chrysoberyl - Alexandrite

The Australian Gemmologist, May 1987, p 218

columbite

Chrysoberyl

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

diopside

Chrysoberyl - Alexandrite

The Journal of Gemmology 1995,24,8, p577

ferrocolumbite

Chrysoberyl

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

fluorite

Chrysoberyl

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

fluorite

Chrysoberyl - Alexandrite

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

goethite

Chrysoberyl - Alexandrite

Zeitschrift der Deutschen Gemmologischen Gesellschaft , Nr 3/4, p126

hematite

Chrysoberyl

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995, Dez, p91

ilmenite

Chrysoberyl

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

limonite

Chrysoberyl

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

mica

Chrysoberyl - Alexandrite

Gemmological Tables, Ulrich Henn , GGA, 2004

monazite

Chrysoberyl - Alexandrite

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

muscovite

Chrysoberyl

The Australian Gemmologist 1987 May p 217-220

oligoclase

Chrysoberyl

The Australian Gemmologist 1987 May p 217-220

orthoclase

Chrysoberyl

The Australian Gemmologist 1987 May p 217-220

phlogopite

Chrysoberyl - Alexandrite

Gubelin, Photoatlas of inclusions, Vol 2, 1995; The Australian Gemmologist, May 1987, p 218

quartz

Chrysoberyl

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

rutile

Chrysoberyl - Alexandrite

Gemmological Tables, Ulrich Henn , GGA, 2004

sillimanite

Chrysoberyl - Alexandrite

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

spessartine

Chrysoberyl

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

talc

Chrysoberyl

The Australian Gemmologist 1987 May p 217-220

zircon

Chrysoberyl - Alexandrite

E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones, volume 2 (2005)

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

alexandrite-Chrysoberyl

 

Dowerin

Western Australia

Australia

MinMag 66(6):985-1002

alexandrite-Chrysoberyl

Carnaiba Mine, Pindobaçu

Campo Formoso District

Bahia

Brazil

Gems & Gemology 1988 Spring

Chrysoberyl

 

Jaqueto

Bahia

Brazil

Lapis 2000/4

alexandrite-Chrysoberyl

Pela Ema

Porangatu

Goias

Brazil

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

 

Santa Maria de Itabira

Goias

Brazil

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

 

Uruaçu

Goias

Brazil

Gems & Gemology 2000 winter p 313

Chrysoberyl

Faisca Mine (Ziemer Mine)

Americana Valley

Minas Gerais

Brazil

Gems & Gemology 1988 Spring

alexandrite-Chrysoberyl

Faisca Mine (Ziemer Mine)

Americana Valley

Minas Gerais

Brazil

Gems & Gemology 1988 Spring

alexandrite-Chrysoberyl

Hematita

Antonio Dias

Minas Gerais

Brazil

Gems & Gemology 1988 Spring

Chrysoberyl

Americana River Valley, Padre Paraiso

Araçuai

Minas Gerais

Brazil

Gems & Gemology 2000 winter p 313

Chrysoberyl

Santana River Valley, Padre Paraiso

Araçuai

Minas Gerais

Brazil

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

 

Esmeraldas de Ferros

Minas Gerais

Brazil

Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1993, Mar, p7-15

Chrysoberyl

Corrego  do Fogo

Malacacheta

Minas Gerais

Brazil

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

Corrego  do Fogo

Malacacheta

Minas Gerais

Brazil

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

Setubal River

Malacacheta

Minas Gerais

Brazil

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

Soturno River

Malacacheta

Minas Gerais

Brazil

Gems & Gemology 2000 winter p 313

Chrysoberyl

Barro Preto Mine

Santana Valley

Minas Gerais

Brazil

Gems & Gemology 1988 Spring

Chrysoberyl

Colatina

Espirito Santo

Southeast Region

Brazil

www.mindat.org

alexandrite-Chrysoberyl

 

Addatigala

Andhra Pradesh

India

Gems & Gemology Fall 2010, p204

Chrysoberyl

 

Addatigala

Andhra Pradesh

India

Gems & Gemology Fall 2010, p204

Chrysoberyl

 

Chintapalli

Andhra Pradesh

India

Gems & Gemology Fall 2010, p204

Chrysoberyl

 

Godavari

Andhra Pradesh

India

Gems & Gemology Fall 2010, p204

alexandrite-Chrysoberyl

 

Godavari

Andhra Pradesh

India

Gems & Gemology Fall 2010, p204

Chrysoberyl

 

Khammam

Andhra Pradesh

India

Gems & Gemology Fall 2010, p204

alexandrite-Chrysoberyl

 

Khammam

Andhra Pradesh

India

Gems & Gemology Fall 2010, p204

Chrysoberyl

 

Nellore

Andhra Pradesh

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

 

Srikakulam

Andhra Pradesh

India

Gems & Gemology Fall 2010, p204

Chrysoberyl

 

Srikakulam

Andhra Pradesh

India

Gems & Gemology Fall 2010, p204

Chrysoberyl

 

Srikakulam district

Andhra Pradesh

India

Gems & Gemology Fall 2010, p204

alexandrite-Chrysoberyl

 

Srikakulam district

Andhra Pradesh

India

Gems & Gemology Fall 2010, p204

Chrysoberyl

Araku, Eastern Ghats Belt

Visakhapatnam District

Andhra Pradesh

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

Araku, Eastern Ghats Belt

Visakhapatnam District

Andhra Pradesh

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

Narsipatnam

Visakhapatnam District

Andhra Pradesh

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

Narsipatnam

Visakhapatnam District

Andhra Pradesh

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

 

Vizianagaram

Andhra Pradesh

India

Gems & Gemology Fall 2010, p204

alexandrite-Chrysoberyl

 

Vizianagaram

Andhra Pradesh

India

Gems & Gemology Fall 2010, p204

Chrysoberyl

Jagdalpur

Deobhog

Chattisgarh (Chhattisgarh)

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

Latapara

Deobhog

Chattisgarh (Chhattisgarh)

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

Mainpur

Deobhog

Chattisgarh (Chhattisgarh)

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

Mainpur

Deobhog

Chattisgarh (Chhattisgarh)

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

Matrapara

Deobhog

Chattisgarh (Chhattisgarh)

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

Sendmuda

Deobhog

Chattisgarh (Chhattisgarh)

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

 

Raipur District

Chattisgarh (Chhattisgarh)

India

Gems & Gemology Fall 2010, p204

alexandrite-Chrysoberyl

 

Raipur District

Chattisgarh (Chhattisgarh)

India

Gems & Gemology Fall 2010, p204

Chrysoberyl

 

Trivandrum

Kerala (Travancore)

India

Dana's New Mineralogy, 8th edition, Richard V.Gaines e.a., 1997

Chrysoberyl

Jerapani

Balangir

Orissa

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

Sarapali

Balangir

Orissa

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

Boudh

Boudh

Orissa

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

Ramgarh

Boudh

Orissa

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

Siminiguda

Kalahandi

Orissa

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

Sirjapali

Kalahandi

Orissa

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

Tundla

Kalahandi

Orissa

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

Belghar

Phulabani

Orissa

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

Dakalguda

Ranigurha

Orissa

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

Dakalguda

Ranigurha

Orissa

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

Hatamuniguda

Rayagada

Orissa

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

Karlagati

Rayagada

Orissa

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

Paikdakulgudu

Rayagada

Orissa

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

Meghpal Ranchipada

Sambalpur

Orissa

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

 

Sinapali

Orissa

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

Sonepur

Subarnapur

Orissa

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

Dharapuram

Didigul-Anna

Tamil Nadu

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

Dharapuram

Didigul-Anna

Tamil Nadu

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

 

Kangayam

Tamil Nadu

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

 

Kanyakumari

Tamil Nadu

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

 

Karur

Tamil Nadu

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

 

Karur

Tamil Nadu

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

Oddanchattram

Madurai

Tamil Nadu

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

Oddanchattram

Madurai

Tamil Nadu

India

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

 

Palni

Tamil Nadu

India

Gems & Gemology Fall 2010, p204

Chrysoberyl

Arumanai

Tirunelveli

Tamil Nadu

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

Karakonam

Tirunelveli

Tamil Nadu

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

Midolam

Tirunelveli

Tamil Nadu

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

Polukal

Tirunelveli

Tamil Nadu

India

Gems & Gemology 2000 winter p 313

Chrysoberyl

Ankazobe Department, Ankazobe Pegmatite Field

Central Merina Region

Antananarivo Province

Madagascar

Gems & Gemology winter 2000 p313

Chrysoberyl

Ambositra Department

Amoron'i Mania Region

Fianarantsoa Province

Madagascar

Gems & Gemology winter 2000 p313

Chrysoberyl

Ilakaka gem deposit, Ilakaka, Departementa Ranohira

Horombe region

Fianarantsoa Province

Madagascar

Extra Lapis No 17

alexandrite-Chrysoberyl

Ilakaka gem deposit, Ilakaka, Departementa Ranohira

Horombe region

Fianarantsoa Province

Madagascar

www.mindat.org

Chrysoberyl

 

Ambatondrazaka

Toamasina (Tamatave) Province

Madagascar

Lapis 2000/4

Chrysoberyl

 

Mogok

Mandalay

Myanmar

Gems & Gemology 2000 winter p 313

alexandrite-Chrysoberyl

Malyshevskoye Deposit, Izumrudnye Kopi, Tokovaya River, Asbest

Sverdlovskaya Oblast'

Oural Mts

Russia

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995, Dez, p 93

Chrysoberyl

Laggola

Polonnaruwa

 

Sri Lanka

Gems & Gemology winter 2000 p313

Chrysoberyl

Avissawella

Kegalla

Central Province

Sri Lanka

Gems & Gemology winter 2000 p313

Chrysoberyl

Kuruwitenna

Nuwara Eliya

Central Province

Sri Lanka

Gems & Gemology winter 2000 p313

Chrysoberyl

Elahera

Polonnaruwa

Central Province

Sri Lanka

Gems & Gemology winter 2000 p313

Chrysoberyl

Kaluganga Valley

Polonnaruwa

Central Province

Sri Lanka

Gems & Gemology winter 2000 p313

Chrysoberyl

Balangoda

Ratnapura

Sabaragamuwa province

Sri Lanka

Gems & Gemology winter 2000 p313

alexandrite-Chrysoberyl

Eheliyagoda

Ratnapura

Sabaragamuwa province

Sri Lanka

Gems & Gemology winter 2000 p313

alexandrite-Chrysoberyl

Pelmadulla

Ratnapura

Sabaragamuwa province

Sri Lanka

Gems & Gemology winter 2000 p313

Chrysoberyl

Pelmadulla

Ratnapura

Sabaragamuwa province

Sri Lanka

Gems & Gemology winter 2000 p313

alexandrite-Chrysoberyl

Rakwana

Ratnapura

Sabaragamuwa province

Sri Lanka

Gems & Gemology winter 2000 p313

Chrysoberyl

Rakwana

Ratnapura

Sabaragamuwa province

Sri Lanka

Gems & Gemology winter 2000 p313

alexandrite-Chrysoberyl

Ratnapura

Ratnapura

Sabaragamuwa province

Sri Lanka

Gems & Gemology winter 2000 p313

Chrysoberyl

Ratnapura

Ratnapura

Sabaragamuwa province

Sri Lanka

Gems & Gemology winter 2000 p313

Chrysoberyl

Walawe

Ratnapura

Sabaragamuwa province

Sri Lanka

Gems & Gemology winter 2000 p313

Chrysoberyl

 

Galle

Southern Province

Sri Lanka

Gems & Gemology winter 2000 p313

Chrysoberyl

Ambalantota

Hambantota

Southern Province

Sri Lanka

Gems & Gemology winter 2000 p313

Chrysoberyl

Alutgama

Kalutara

Southern Province

Sri Lanka

Gems & Gemology winter 2000 p313

Chrysoberyl

Horana

Kalutara

Southern Province

Sri Lanka

Gems & Gemology winter 2000 p313

Chrysoberyl

Akuressa

Matara

Southern Province

Sri Lanka

Gems & Gemology winter 2000 p313

alexandrite-Chrysoberyl

Akuressa

Matara

Southern Province

Sri Lanka

Gems & Gemology winter 2000 p313

Chrysoberyl

Deniyaya

Matara

Southern Province

Sri Lanka

Gems & Gemology winter 2000 p313

alexandrite-Chrysoberyl

Morawaka

Matara

Southern Province

Sri Lanka

Gems & Gemology winter 2000 p313

Chrysoberyl

Embilipitiya

Monaragata

Southern Province

Sri Lanka

Gems & Gemology winter 2000 p313

alexandrite-Chrysoberyl

 

Pattara

Southern Province

Sri Lanka

Gems & Gemology Fall 2010, p204

Chrysoberyl

Haputale

Badulla

Uva Province

Sri Lanka

Gems & Gemology winter 2000 p313

alexandrite-Chrysoberyl

Magara

Lake Manyara

Arusha Region

Tanzania

Emeralds of the World English extraLapis Vol. 2 2002 pp24-35

Chrysoberyl

 

Lumesule River

Mtwara Region

Tanzania

Gems & Gemology Fall 2010, p204

alexandrite-Chrysoberyl

 

Tunduru

Ruvuma Region

Tanzania

www.mindat.org

Chrysoberyl

Green Walking Stick, Mwami

Karoi (Urungwe; Hurungwe) District

Mashonaland West

Zimbabwe

Gems & Gemology Fall 2010, p204

Chrysoberyl

Haslemere, Mwami

Karoi (Urungwe; Hurungwe) District

Mashonaland West

Zimbabwe

Gems & Gemology Fall 2010, p204

Chrysoberyl

Pearl, Mwami

Karoi (Urungwe; Hurungwe) District

Mashonaland West

Zimbabwe

Gems & Gemology Fall 2010, p204

Chrysoberyl

Spider, Mwami

Karoi (Urungwe; Hurungwe) District

Mashonaland West

Zimbabwe

Gems & Gemology Fall 2010, p204

alexandrite-Chrysoberyl

Novello Claims, Bikita, Bikita, Masvingo (Fort Victoria)

Masvingo District

Mashonaland West

Zimbabwe

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft

alexandrite-Chrysoberyl

Somabula

Gweru (Gwelo) District

Midlands Province

Zimbabwe

Gems & Gemology Fall 2010, p204

Chrysoberyl

Somabula

Gweru (Gwelo) District

Midlands Province

Zimbabwe

Gems & Gemology Fall 2010, p204

 

CHEMICAL DATA

Stone

Colour

Locality

Reference

SiO2

Al2O3

MnO

MgO

FeO

TiO2

CaO

Na2O

Cr2O3

V2O3

Fe2O3

BeO

K2O

NiO

Ga2O3

Chrysoberyl - Alexandrite

 

Carnaiba

Brazil

Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1987, Nr 3/4, p121-131

 

 

 

 

 

 

 

 

0.44

0.03

2.21

 

 

 

 

Chrysoberyl - Alexandrite

 

Hematita

Brazil

Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1987, Nr 3/4, p121-131

 

 

 

 

 

 

 

 

0.4

0.02

1.23

 

 

 

 

Chrysoberyl - Alexandrite

 

Malacacheta

Brazil

Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1987, Nr 3/4, p121-131

 

 

 

 

 

 

 

 

0.5

0.035

0.5

 

 

 

 

Chrysoberyl - Alexandrite

 

Minaçu

Brazil

Zeitschrift der Deutschen Gemmologischen Gesellschaft, 2010, Nr 3/4, p79

 

81.6

 

 

 

0.3

 

 

0.36

 

0.67

 

 

 

0.04

Chrysoberyl - Alexandrite

cat's eye

 

East Africa

The Journal of Gemmology 1995, Vol 24, N°8, p 574

0.5

78.76

 

 

1.36

 

0.3

 

0.18

 

 

18.85

 

 

 

Chrysoberyl

yellowish green

Ilakaka

Madagascar

Gems & Gemology 2002 Fall

 

78.83

0.01

 

 

0.04

 

 

0.06

0.02

1.07

 

 

 

 

Chrysoberyl

green

Ilakaka

Madagascar

Gems & Gemology 2002 Fall

 

78.74

0.01

 

 

0.1

 

 

0.12

0.05

1.04

 

 

 

 

Chrysoberyl - Alexandrite

 

 

Madagascar

Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1987, Nr 3/4, p121-131

 

 

 

 

 

 

 

 

0.19

 

0.47

 

 

 

 

Chrysoberyl - Alexandrite

 

Tokowaja

Russia

Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1987, Nr 3/4, p121-131

 

 

 

 

 

 

 

 

0.82

0.035

0.94

 

 

 

 

Chrysoberyl - Alexandrite

 

Franqueira

Spain

The Journal of Gemmology 1997, Vol 25, N°5 p 351

0.13

 

0.02

0.07

0.88

0.24

0.01

0.02

1.49

0.05

 

 

0.01

0.02

 

Chrysoberyl - Alexandrite

 

 

Sri Lanka

Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1987, Nr 3/4, p121-131

 

 

 

 

 

 

 

 

0.45

0.03

1.01

 

 

 

 

Chrysoberyl - Alexandrite

 

Lake Manyara

Tanzania

Gems & Gemology 1976, Fall, p205

0.27

77.5

 

 

 

0.1

 

 

0.23

 

0.7

20

 

 

 

Chrysoberyl - Alexandrite

 

Novello Claims

Zimbabwe

Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1987, Nr 3/4, p121-131

 

 

 

 

 

 

 

 

1.61

 

1.91