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INVESTIGATIONS

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

Colour

Location

Info

ne min

ne max

no min

no max

Spectrum

UVS

UVL

Reference

Apatite

1.625

1.64

3.13

3.17

 

 

yellow to greenish yellow

Hormuz Island, Iran

2 to 4 ct

 

 

 

 

 

inert

inert

The Journal of Gemmology 2016 Vol 35, No. 1, p6-7

Apatite

1.627

1.63

0.003

0.003

3.21

3.21

bluish green

Madagascar

2.23ct

 

 

 

 

487, 530, 576, 582, 590nm

 

 

GIA Gem Database  35323

Apatite

1.629

1.631

0.002

0.002

3.21

3.21

colourless

Kazakhstan

0.25 ct

 

 

 

 

lines in the green

bluish

yellowish

ACAM Lab  N923

Apatite

1.63

1.633

0.003

0.003

3.15

3.15

green

 

 

 

 

 

 

 

 

 

ACAM labo 

Apatite

1.63

1.63

 

 

3.2

3.2

yellow-brown, cat's-eye

Madagascar

5.7 ct

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2000 Jun 2000, p61

Apatite

1.63

1.634

0.004

0.004

3.19

3.19

greenish blue

Mogok, Myanmar

4.80ct

 

 

 

 

 

weak yellow

 

GIA Gem Database  34648

Apatite

1.63

1.635

0.005

0.005

3.22

3.22

bluish green

Madagascar

5.12ct

 

 

 

 

485, 530, 578, 584, 588, 591, 595nm

 

 

GIA Gem Database  34325

Apatite

1.63

1.634

0.004

0.004

3.37

3.37

yellow

Cerro de Marcado Mine, Victoria de Durango, Durango, Mexico

16.69ct

 

 

 

 

530, 577, 582, 588, 594

weak orangy yellow

 

GIA Gem Database  33765

Apatite

1.63

1.636

0.006

0.006

3.17

3.17

light blue

 

0.24 ct

 

 

 

 

lines in the green

inert

inert

ACAM Lab  N2025

Apatite

1.63

1.64

0.01

0.01

3.2

3.2

green

 

0.89 ct

 

 

 

 

mines in the yellow

inert

inert

ACAM Lab  N4773

Apatite

1.63

1.639

0.009

0.009

3.28

3.28

yellow

 

1.22ct

 

 

 

 

 

orange

yellow

ACAM Lab  N147

Apatite

1.63

1.632

0.002

0.002

3.24

3.24

green

 

0.41ct

 

 

 

 

lines in the green

inert

inert

ACAM Lab  N564

Apatite

1.63

1.635

0.004

0.005

3.17

3.17

yellowish green

Nhamatanda, Mozambique

10.61ct and 3.88ct

 

 

 

 

 

weak yellow

inert

The Journal of Gemmology 2015 Vol 38, No 8, p654

synthetic apatite

1.63

1.637

0.007

0.007

3.22

3.22

colour change : purple-pink to violetish blue

 

 

 

 

 

 

many lines

inert

inert

Gems & Gemology 2001 Spring p 57

Apatite

1.631

1.634

0.003

0.003

3.23

3.26

colour changing : pinkish orange (daylight , greenish yellow (fluorescent light)

Akzhailyau pegmatite, Kazakhstan

pink colour fades on exposure to daylight

 

 

 

 

didymium

pink

pink

Gems & Gemology 2002 winter p350

Apatite

1.631

1.638

0.007

0.007

3.24

3.24

greenish brown

Sri Lanka

4.17ct

 

 

 

 

yellow absorption

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1998 Sep, p169

Apatite

1.631

1.635

0.005

0.005

3.2

3.2

yellow-green

Mwami, Mashonaland West Province, Zimbabwe

25.27ct

 

 

 

 

578, 587 nm

 

 

GIA Gem Database  35251

Apatite

1.631

1.635

0.004

0.004

3.24

3.24

light blue

Madagascar

 

 

 

 

 

lines in the green

inert

inert

ACAM Lab  N1841

Apatite

1.631

1.638

0.007

0.007

3.22

3.22

yellow

Mexico

4.26 ct

 

 

 

 

lines in the green and blue

inert

inert

ACAM Lab  N928

Apatite

1.631

1.635

0.004

0.004

3.23

3.23

blue

 

1.06 ct

 

 

 

 

 

inert

inert

ACAM Lab  N1437

Apatite

1.632

1.636

0.004

0.004

3.21

3.21

green-blue

Itongafeno, Mahaiza, Antananarivo Province, Madagascar

9.10ct

 

 

 

 

578, 582, 590 nm, cut-off 670nm

inert

inert

GIA Gem Database  34401

Apatite

1.632

1.638

0.006

0.006

3.21

3.21

light blue

Madagascar

1.28 ct

 

 

 

 

lines in the green

inert

inert

ACAM Lab  N1842

Apatite

1.632

1.638

0.006

0.006

3.28

3.28

blue

 

1.31ct

 

 

 

 

 

weak greenish

inert

ACAM Lab  N1023

Apatite

1.632

1.64

0.008

0.008

3.15

3.15

blue

 

0.18 ct

 

 

 

 

 

inert

inert

ACAM Lab  N147

Apatite

1.632

1.636

0.004

0.004

3.22

3.35

yellowish-green, green, greenish brown to red-brown

Umba Valley, Tanzania

cat's-eyes

 

 

 

 

 

 

 

The Journal of Gemmology 1983 Vol18, N7, p592-595

Apatite

1.635

1.64

0.005

0.005

3.21

3.21

violetish purple

Auburn, Maine, USA

1.60ct

 

 

 

 

 

 

 

GIA Gem Database  33779

Apatite

1.635

1.64

0.005

0.005

3.13

3.13

dark blue

Brazil

2.35ct

 

 

 

 

cut-off 420 and 600nm

 

 

GIA Gem Database  35327

Apatite

1.635

1.639

0.004

0.004

3.22

3.22

dark blue

 

 

 

 

 

 

 

"dusty" green

inert

The Journal of Gemmology 1977 N5, p235

Apatite

1.636

1.64

0.004

0.004

3.21

3.21

blue

 

 

 

 

 

 

 

 

 

ACAM labo 

Apatite

1.636

1.64

0.004

0.004

3.24

3.24

greyish blue

Mogok, Myanmar

3.03ct

 

 

 

 

 

weak green

inert

GIA Gem Database  33783

Apatite

1.636

1.64

0.004

0.004

3.21

3.21

dark blue

Itatiaia Mine, Conselheiro Pena, Minas Gerais, Brazil

4.94ct

 

 

 

 

cut-off 420 and 580nm

inert

inert

GIA Gem Database  34265

Apatite

1.637

1.642

0.005

0.005

3.11

3.13

yellowish white

Potosi department, Bolivia

opaque with transparent core

 

 

 

 

 

pale orange

 

The Journal of Gemmology 1998 Vol26, N1, p41-47

Apatite

1.637

1.641

0.004

0.004

3.19

3.19

dark green

Itatiaia Mine, Conselheiro Pena, Minas Gerais, Brazil

7.10ct

 

 

 

 

 

inert

inert

GIA Gem Database  34266

Apatite

1.638

1.64

0.002

0.002

3.2

3.2

green

 

5.15 ct

 

 

 

 

lines in the green

inert

inert

ACAM Lab  N2179

Apatite

1.638

1.642

0.004

0.004

3.16

3.16

blue

 

0.19 ct

 

 

 

 

 

 

 

ACAM Lab  N564

Apatite

1.638

1.644

0.003

0.005

3.17

3.17

medium-dark to dark, moderately strong, slightly yellowish green

 

1.28ct and 3.78ct

 

 

 

 

 

inert

inert

The Journal of Gemmology 2014 Vol 34, N4, p 289-290

Apatite

1.64

1.64

 

 

3.16

3.16

greenish blue

 

cabochon 5.72, cat's-eye, translucent, spot RI

 

 

 

 

weak band at 594-618 nm; weak general absorption from 633 to 700 nm

inert

inert

Gems & Gemology 1990 Fall,p230

Apatite

1.641

1.65

0.009

0.009

3.27

3.27

greenish yellow

Brazil

1.47ct

 

 

 

 

 

inert

inert

http://www.spec4gem.info/index.php 2015

Apatite

1.644

1.655

0.005

0.006

3.14

3.2

emerald green

Rssing, Namibia

 

1.644

1.649

1.650

1.655

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1988 37, Nr 1/2, p78-79

Apatite

1.644

1.65

0.006

0.006

3.15

3.15

yellow

Tanzania

3.43ct

 

 

 

 

 

inert

inert

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

Apatite

1.645

1.648

0.003

0.003

3.201

3.201

yellow

Momeik (Molo) , Mogok, Birma

 

 

 

 

 

 

weak

weak

The Australian Gemmologist 2005 22, p303-309

Apatite

 

 

 

 

3.23

3.23

red-orange

Mesa Grande, an Diego County, California, USA

6.33ct

 

 

 

 

576, 580, 582, 586 nm

yellowish orange

weak orange

GIA Gem Database  35161

Apatite

 

 

 

 

 

 

reddish brown (incandescent light) to greenish yellow-brown (daylight)

Madagascar

cabochon 584.22ct, cat's-eye

 

 

 

 

 

 

 

The Journal of Gemmology 2016 35 (3), p 186-188

 

TABLES

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

ne min

ne max

no min

no max

Reference

Apatite

1.598

1.658

0.001

0.013

3.1

3.35

1.629

1.653

1.632

1.658

http://www.geminterest.com 

Apatite

1.625

1.657

0.001

0.007

3.17

3.27

 

 

 

 

Gemmo.eu 2013

Apatite

1.628

1.653

0.002

0.008

3.16

3.23

1.628

1.665

1.632

1.667

Bestimmungstabellen fr Edelsteine, Birgit Gnther, 2008 

Apatite

1.628

1.649

0.002

0.008

3.1

3.35

 

 

 

 

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

Apatite

1.628

1.662

0.002

0.007

3.14

3.23

1.628

1.656

1.632

1.662

Gemmological Tables, Ulrich Henn, 2004 

Apatite

1.628

1.649

0.001

0.013

3.1

3.35

 

 

 

 

http://www.gemmology.be 

Apatite

1.628

1.649

0.001

0.013

3.1

3.35

1.628

1.642

1.632

1.649

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Apatite

1.628

1.658

0.001

0.007

3.1

3.35

1.628

1.653

1.629

1.658

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

Apatite

1.628

1.65

0.002

0.008

3.13

3.23

 

 

 

 

Gemology Tools Professional 2010

Apatite

1.63

1.64

0.003

0.004

3.15

3.22

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Apatite

1.63

1.64

0.002

0.005

3.15

3.23

 

 

 

 

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Apatite

1.63

1.64

0.002

0.004

3.17

3.23

 

 

 

 

Gems, R Webster, 5th edition 1994 

synthetic apatite

1.63

1.637

0.007

0.007

3.22

3.22

1.630

1.630

1.637

1.637

Bestimmungstabellen fr Edelsteine, Birgit Gnther, 2008 

Wilkeite - apatite group

1.636

1.65

0.01

0.01

3.12

3.23

 

 

 

 

Gemology Tools Professional 2010

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Apatite

blue

natural radiation induced color centers involving ions SO3-

http://minerals.caltech.edu

Apatite

dark blue

0- -> Mn5+ charge transfer

Gems & Gemology Summer 1988

Apatite

green

natural radiation induced color centers involving ions SiO3-

http://minerals.caltech.edu

Apatite

pink

F vacancy with a trapped electron

Gems & Gemology Summer 1988

 

MINERAL INCLUSIONS

Inclusion

Stone

Reference

goethite

Apatite

The Journal of Gemmology, 1995, Vol24, N8 p 577

hematite

Apatite

The Journal of Gemmology, 2016, 35 (1), p6

rutile

Apatite

The Journal of Gemmology, 1995, Vol24, N8 p 577

tourmaline

Apatite

The Journal of Gemmology, 1996,25,4, p269

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

Apatite

Bananeira

Itamb

Bahia

Brazil

Gems & Gemology 2000 winter p324

Apatite

Melkote

Mysore

Karnataka

India

Gems & Gemology 2000 winter p324

Apatite

Katteri

Mysore

Karnataka

India

Gems & Gemology 2000 winter p324

Apatite

Banjipadar

Kalahandi

Orissa

India

Gems & Gemology 2000 winter p324

Apatite

Peryasoagai

Salem

Tamil Nadu

India

Gems & Gemology 2000 winter p324

Apatite

Kurumbapatti

Salem

Tamil Nadu

India

Gems & Gemology 2000 winter p324

Apatite

 

 

Hormuz island

Iran

The Journal of Gemmology 2016 Vol 35, No. 1, p6-7

Apatite

 

Akzhailyau (Akjaylau Mts.; Akzhalau Mts.)

 

Kazakhstan

Gems & Gemology 2002 winter p350

Apatite

 

Milanoa

Antsirana

Madagascar

Gems & Gemology 2000 winter p324

Apatite

Cerro de Mercado Mine, Victoria de Durango

Durango

Durango

Mexico

Mineralien Welt 2001/4

Apatite

Kyaukpyatthat

Mogok

Mandalay

Myanmar

Gems & Gemology 2000 winter p324

Apatite

Momeik

Mogok

Mandalay

Myanmar

The Australian Gemmologist (2005) 22, p308

Apatite

 

Kegalla

Central Proviince

Sri Lanka

Gems & Gemology 2000 winter p324

Apatite

 

Kurunegalla

Central Proviince

Sri Lanka

Gems & Gemology 2000 winter p324

Apatite

Nalanda

Matale

Central Proviince

Sri Lanka

Gems & Gemology 2000 winter p324

Apatite

Rakwana

Ratnapura

Sabaragamuwa province

Sri Lanka

Gems & Gemology 2000 winter p324

Apatite

Balangoda

Ratnapura

Sabaragamuwa province

Sri Lanka

Gems & Gemology 2000 winter p324

Apatite

Eheliyagoda

Ratnapura

Sabaragamuwa province

Sri Lanka

Gems & Gemology 2000 winter p324

Apatite

Akuressa

Matara

Southern Province

Sri Lanka

Gems & Gemology 2000 winter p324

Apatite

Deniyaya

Matara

Southern Province

Sri Lanka

Gems & Gemology 2000 winter p324

 

CHEMICAL DATA

Stone

Colour

Locality

Reference

MgO

FeO

CaO

Na2O

F

P2O5

Cl

Apatite

cat's eye

 

East Africa

The Journal of Gemmology 1995, Vol 24, N8, p 574

0.25

0.14

52.54

0.27

3.15

41.9

1.15