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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

beryl

1.564

1.575

0.007

0.008

2.685

2.688

golden yellow, pale yellow, pale yellow-green, pale green, medium green, pale blue

Luumaki, Finland

 

1.564

1.568

1.572

1.575

 

inert

inert

Gems & Gemology 1993 spring, p30-37

Beryl

1.568

1.575

0.005

0.006

2.63

2.69

light bluish green and greenish blue

Kaduna State, Nigeria

 

1.568

1.570

1.574

1.575

line at 427 nm, weak lines near 700 nm

inert

inert

Gems & Gemology 2012 Fall, p215-217

Beryl

1.568

1.582

0.005

0.006

2.699

2.699

two-coloured: colourless and yellow

Pulbani mining area, Orissa, India

3.97ct, 4.13ct

1.568

1.578

1.572

1.582

540nm

inert

inert

The Journal of Gemmology 1987 Vol 20, N°6, p352-355

Beryl

1.569

1.58

0.008

0.008

2.7

2.7

brownish-yellow, golden beryl

Afghanistan

 

1.569

1.572

1.576

1.580

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Sep, p3

Beryl

1.57

1.58

 

 

2.69

2.71

yellow-green to brownish yellowish green

India

cat's eye

 

 

 

 

absorption at 547nm

inert

inert

Gems & Gemology 2009 Winter, p297

Beryl

1.57

1.58

 

 

2.69

2.71

yellow-green to brownish yellowish green

Jaipur, India

cabochon 46.76-283.62 ct, cat's-eye caused by needle-like growth tubes

 

 

 

 

absorption band of unknown origin at ~547 nm

inert

inert

Gems & Gemology 2009 Winter, p297

beryl

1.57

1.576

0.006

0.006

2.68

2.68

yellowish green

Lüumäki, Finland

 

 

 

 

 

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1994 Jun, p1

Beryl

1.57

1.577

0.007

0.007

2.7

2.7

yellowish green

Sabinopolis, Minas Gerais, Brazil

36.38ct

 

 

 

 

 

inert

inert

GIA Gem Database  33005

beryl

1.57

1.578

0.008

0.008

2.7

2.7

bicoloured : blue-yellow

Tajikistan

 

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2002 Mar p9-10

Beryl

1.571

1.578

0.007

0.007

2.7

2.7

yellowish green

Brumado, Bahia State, Brazil

23.35ct

 

 

 

 

 

inert

inert

GIA Gem Database  33004

Beryl

1.575

1.583

 

 

 

 

light green

Bucha, Pakistan

chelsea: light brownish red

 

 

 

 

 

 

 

The Journal of Gemmology 1985 Jan, p404

Beryl

1.576

1.581

0.005

0.005

2.71

2.71

bluish green

Ratnapura, Sabaragamuwa, Sri Lanka

10.27ct

 

 

 

 

 

inert

inert

GIA Gem Database  34815

Beryl

1.579

1.585

0.006

0.006

2.8

2.8

greenish yellow

Araçuai, Minas Gerais, Brazil

7.62ct

 

 

 

 

broad absorption below 420nm

inert

inert

GIA Gem Database  33052

Beryl

1.58

1.587

0.007

0.007

2.72

2.72

brownish orange

India

4.47ct, semitransparent to translucent

 

 

 

 

general absorption to 450 nm and a cutoff at 670 nm

inert

inert

Gems & Gemology 2008 Summer, p167-168

Beryl

1.582

1.6

0.006

0.008

2.67

2.74

green

Eastern Himalaya

vanadium-beryl

1.582

1.592

1.590

1.600

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2002 Sep, p107-114

Beryl

1.588

1.595

0.007

0.007

0

0

dyed green

 

 

 

 

 

 

 

weak chalky yellow

very weak chalky yellow

Gems & Gemology 2016 Winter, p393-401

Beryl

1.59

1.598

0.008

0.008

2.81

2.81

smoky grey

 

71.57ct

 

 

 

 

no features

inert

inert

Gems & Gemology 2009 Fall, p216-217

beryl

 

 

 

 

 

 

bicoloured : green-light green and green-brown

Erongo Mts, Namibia

 

 

 

 

 

 

 

 

Gems & Gemology 2006 winter, p 272

Beryl-Aquamarine

1.561

1.57

0.007

0.009

2.68

2.69

light greenish blue

Klein Spitzkoppe, Namibië

chelsea: yellow-green

1.561

1.562

1.569

1.570

faint line at 430

 

 

Gems & Gemology 1998 summer, p114-125

Beryl-Aquamarine

1.562

1.571

0.005

0.005

2.68

2.7

almost colourless to a medium to deep sky-blue colour

Mt Surprise, Queensland, Australia

RI and density increase with increasing depth of blue colour

1.562

1.566

1.567

1.571

 

inert

inert

The Journal of Gemmology 1985 Vol 19, No 8, p707

Beryl-Aquamarine

1.565

1.57

0.005

0.005

 

 

 

Irfersgrün, Sachsen, Germany

 

 

 

 

 

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1993 Sep, p123-127

Beryl-Aquamarine

1.565

1.572

0.006

0.006

2.66

2.67

pastel-coloured greenish blue

Padre Paraiso, Minas Gerais, Brazil

 

1.565

1.566

1.571

1.572

 

 

 

Gems & Gemology 2006 spring p87

Beryl-Aquamarine

1.565

1.572

0.006

0.006

2.66

2.67

pastel-coloured greenish blue

Padre Paraiso, Minas Gerais, Brazil

can exceed 100cts

1.565

1.566

1.571

1.572

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2005 Mar, p47-51

Beryl-Aquamarine

1.568

1.575

0.005

0.005

2.68

2.71

light blue

Kaduna State, Nigeria

 

1.568

1.570

1.573

1.575

line at 427 nm

inert

inert

Gems & Gemology 2012 Fall, p215-217

Beryl-Aquamarine

1.569

1.579

0.03

0.06

2.66

2.7

light to medium blue

Thuong Xuan District, Thanh Hoa Province, Vietnam

 

1.569

1.573

1.572

1.579

 

inert

inert

Gems & Gemology 2011 Spring, p42-48

Beryl-Aquamarine

1.57

1.57

 

 

2.69

2.73

bluish green

 

 

 

 

 

 

IR : 3051, 3035, 2962, 2927 and 2873 cm-1

 

fractures chalky white

Gems & Gemology 2009 Fall p197-199

Beryl-Aquamarine

1.57

1.575

0.005

0.005

2.7

2.74

 

Orissa, India

 

 

 

 

 

 

inert

inert

The Journal of the Gemmological Association of Hongkong 1996 Vol XIX, p50-52

Beryl-Aquamarine

1.57

1.575

0.005

0.005

2.71

2.71

blue, greenish blue

Sakangyi, Mogok, Birma

 

 

 

 

 

 

inert

inert

The Australian Gemmologist 2005 22, p303-309

Beryl-Aquamarine

1.57

1.579

0.007

0.008

2.68

2.69

medium saturated blue

Sao José de Safira, Governador Valadares, Minas Gerais, Brazil

12 to 26 ct

1.578

1.579

1.570

1.572

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2005 Sep, p69-70

Beryl-Aquamarine

1.571

1.578

0.004

0.005

2.68

2.8

blue, pale blue

Gur-Salak pegmatite, Konar Province, Afghanistan

 

1.571

1.573

1.575

1.578

 

inert

inert

The Journal of Gemmology 2008 Vol 31/ No1-2/p31-39

Beryl-Aquamarine

1.571

1.579

0.008

0.008

2.68

2.73

 

Opanayake, Sri Lanka

weak Fe content

 

 

 

 

 

inert

inert

Revue de  Gemmologie A.F.G. 2007 N° 161 Sep

Beryl-Aquamarine

1.572

1.59

0.008

0.009

2.67

2.72

light to medium blue to greenish blue

Masino-Bregaglia Massif, Italy

 

1.580

1.590

1.572

1.579

UV-VIS-NIR: 370,426,600,820nm ; IR 3699, 3660,3597cm-1

inert

inert

Gems & Gemology 2009 Fall, p204-207

Beryl-Aquamarine

1.572

1.589

0.009

0.009

2.7

2.73

 

Mozambique

 

1.572

1.580

1.582

1.589

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1992 Sep, p107-110

Beryl-Aquamarine

1.572

1.579

0.007

0.007

2.69

2.69

 

Somaliland

0.18ct

 

 

 

 

 

 

 

The Journal of Gemmology 2000 Vol27, N°3, p146

Beryl-Aquamarine

1.573

1.582

0.006

0.007

2.69

2.73

medium blue to slightly greenish blue

Ambatofotsikely, Madagascar

inclusions : reddish brown hematite and black ilmenite

1.573

1.575

1.580

1.582

weak absorption at 456 nm

 

 

Gems & Gemology 2012 Fall, p205-208

Beryl-Aquamarine

1.573

1.581

0.008

0.008

2.71

2.71

bluish green

Pakistan

cabochon 97.43ct, monazite-Ce inclusions

 

 

 

 

 

 

 

The Journal of Gemmology 2016 35 (3), p 188-189

Beryl-Aquamarine

1.574

1.58

0.006

0.006

2.77

2.77

greenish blue

Itongafeno, Mahaiza, Antananarivo Province, Madagascar

9.60ct

 

 

 

 

 

inert

inert

GIA Gem Database  34398

Beryl-Aquamarine

1.574

1.58

0.006

0.006

2.72

2.75

 

Rajasthan, India

 

 

 

 

 

 

inert

inert

The Journal of the Gemmological Association of Hongkong 1996 Vol XIX, p50-52

Beryl-Aquamarine

1.575

1.582

0.007

0.007

2.7

2.71

light blue

Mexico

 

1.575

1.580

1.582

1.587

 

inert

inert

Gems & Gemology 2016 Fall, p 317-318

Beryl-Aquamarine

1.577

1.583

0.005

0.005

2.7

2.7

pale greenish blue to light blue, and even more intense blue

Akkarella, Sri Lanka

typically 1 to 3 ct, but larger up to 20ct exist

1.577

1.578

1.582

1.583

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2008 57/1-2, p23-27

Beryl-Aquamarine

1.577

1.587

0.007

0.007

2.71

2.71

 

Akkerella estate, Ratnapura, Sri Lanka

 

1.577

1.580

1.584

1.587

 

inert

inert

Gems & Gemology 2006 spring p63

Beryl-Aquamarine

1.577

1.585

0.006

0.008

2.72

2.74

intense blue

Tatu, Itabira, Minas Gerais, Brazil

 

1.577

1.579

1.583

1.585

 

 

 

Gems & Gemology 2006 spring p87

Beryl-Aquamarine

1.577

1.585

0.006

0.008

2.72

2.74

intensive blue

Tatu, Minas Gerais, Brazil

between 1 and 10 carats

1.577

1.579

1.583

1.585

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2005 Mar, p47-51

Beryl-Aquamarine

1.579

1.586

0.005

0.006

 

 

 

Hyakule, Nepal

 

1.579

1.581

1.585

1.586

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1993 Sep, p73

Beryl-Aquamarine

1.579

1.583

0.003

0.004

 

 

 

Taplejung, Nepal

 

1.579

1.580

1.583

1.583

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1993 Sep, p73

Beryl-Aquamarine

1.58

1.586

0.006

0.006

2.74

2.77

sky blue to deep blue

Andhra Pradesh, India

 

 

 

 

 

 

inert

inert

The Journal of the Gemmological Association of Hongkong 1996 Vol XIX, p50-52

Beryl-Aquamarine

1.58

1.59

0.008

0.008

2.74

2.75

intense blue

Jacutinga, Minas Gerais, Brazil

 

1.580

1.582

1.588

1.590

 

 

 

Gems & Gemology 2006 spring p87

Beryl-Aquamarine

1.58

1.59

0.008

0.008

2.74

2.75

intensive blue

Jacutinga, Minas Gerais, Brazil

hardly exceed 3 cts

1.580

1.582

1.588

1.590

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2005 Mar, p47-51

Beryl-Aquamarine

1.58

1.578

0.005

0.006

 

 

 

Mangsima, Nepal

 

1.580

1.584

1.575

1.578

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1993 Sep, p73

Beryl-Aquamarine

1.58

1.588

0.008

0.008

2.72

2.72

blue

Mocuba, Zambezia Province, Mozambique

12.58ct

 

 

 

 

 

inert

inert

GIA Gem Database  34496

Beryl-Aquamarine

1.58

1.583

0.003

0.003

 

 

 

Phakuwa, Nepal

 

 

 

 

 

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1993 Sep, p73

Beryl-Aquamarine

1.58

1.587

0.007

0.007

2.77

2.77

greenish blue

Santa Maria do Suaçui, Minas Gerais, Brazil

17.96ct

 

 

 

 

 

inert

inert

GIA Gem Database  34268

Beryl-Aquamarine

1.58

1.586

0.006

0.006

2.47

2.77

sky blue to bluish green to deep sky blue

Tamil Nadu, India

 

 

 

 

 

 

inert

inert

The Journal of the Gemmological Association of Hongkong 1996 Vol XIX, p50-52

Beryl-Aquamarine

1.582

1.589

0.007

0.007

2.76

2.76

 

Nigeria

0.25 to 3ct

 

 

 

 

Fe, unusual growth zoning with wavy and planar features (like hydrothermal synthetics)

inert

inert

Gems & Gemology 2005 Spring , 56

Beryl-Aquamarine

1.582

1.59

0.008

0.008

2.73

2.73

greenish blue

St. Anne's Mine, Mwami, Karoi District, Mashonaland, Zimbabwe

7.78ct

 

 

 

 

 

inert

inert

GIA Gem Database  35272

Beryl-Aquamarine

1.582

1.59

0.007

0.008

2.73

2.778

medium blue, medium dark blue

Tongafeno, Madagascar

 

1.582

1.583

1.590

1.590

 

inert

inert

The Journal of Gemmology 1989 Vol21, N°7, p423-430

Beryl-Aquamarine

1.592

1.601

0.008

0.009

2.8

2.87

dark greyish blue

Yukon, Canada

semi-transparent, translucent

 

 

 

 

 

inert

inert

Gems & Gemology 2008 fall, p216

Beryl-Emerald

1.558

1.57

0.007

0.008

2.6

2.7

pale to intens bluisg green

Delbegetey deposit, Shyghys Qazaqstan Oblysy , Kazakhstan

largest recovered X : 1.5cm

1.558

1.562

1.566

1.570

 

inert

weak red

Gems & Gemology 2007 fall, p285

Beryl-Emerald

1.56

1.576

0.005

0.007

2.64

2.68

 

Kaduna , Nigeria

 

1.560

1.569

1.570

1.576

 

 

 

Revue de Gemmologie A.F.G. 1992 n°113, p2-4

Beryl-Emerald

1.56

1.574

0.005

0.006

2.64

2.68

 

Kaduna, Nigeria

 

1.560

1.569

1.566

1.574

 

 

 

The Journal of Gemmology 1996 Vol 25, N°2 p117-141

Beryl-Emerald

1.566

1.588

0.005

0.008

2.682

2.727

 

Chivor, Colombia

chelsea : strong red

1.566

1.581

1.572

1.588

 

generally inert

inert to medium red

L'émeraude, Connaissances actuels et prospectives , AFG, 1998 1998 p230

Beryl-Emerald

1.566

1.575

0.005

0.005

2.67

2.68

 

Emmaville, New South Wales, Australia

 

1.566

1.570

1.571

1.575

 

 

 

The Australian Gemmologist 1991 Vol 17/12 p488-497

Beryl-Emerald

1.566

1.588

0.005

0.008

2.682

2.727

 

Muzo, Colombia

chelsea: strong red

1.566

1.581

1.572

1.588

 

inert

inert to medium red

L'émeraude, Connaissances actuels et prospectives , AFG, 1998 1998 p230

Beryl-Emerald

1.567

1.577

0.005

0.007

 

 

 

Poona, Australia

 

1.567

1.571

1.573

1.577

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1991 Apr, p49

Beryl-Emerald

1.568

1.577

0.005

0.006

2.69

2.69

 

Chivor, Colombia

 

1.568

1.571

1.573

1.577

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Dez, p65

Beryl-Emerald

1.568

1.575

0.005

0.007

2.62

2.65

emerald green

Kaduna State, Nigeria

 

1.568

1.569

1.573

1.575

line at 427 nm, weak lines near 700 nm

inert

inert

Gems & Gemology 2012 Fall, p215-217

Beryl-Emerald

1.568

1.574

0.006

0.006

2.76

2.76

 

Somaliland

0.15ct

 

 

 

 

 

 

 

The Journal of Gemmology 2000 Vol27, N°3, p144-45

Beryl-Emerald

1.568

1.575

0.007

0.007

2.69

2.69

green

Sumbawanga, Tanzania

2.29 ct

 

 

 

 

lines at 700nm

weak red

faint red

Gems & Gemology 2012 Fall, p220-221

Beryl-Emerald

1.569

1.576

0.007

0.007

2.704

2.704

 

Burbar, Colombia

 

 

 

 

 

 

 

 

Gems & Gemology 1982 Fall p130

Beryl-Emerald

1.569

1.58

0.006

0.007

2.68

2.71

 

Coscuez, Colombia

 

1.569

1.574

1.576

1.580

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Dez, p65

Beryl-Emerald

1.569

1.576

0.005

0.006

2.65

2.67

 

Jos, Nigeria

 

1.569

1.570

1.574

1.576

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Dez, p65

Beryl-Emerald

1.569

1.576

0.005

0.006

2.65

2.67

 

Nigeria

 

1.569

1.570

1.574

1.576

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1991 Dec, p181-187

Beryl-Emerald

1.569

1.576

0.007

0.007

2.704

2.704

 

Pena Blanca, Colombia

 

1.569

1.569

1.576

1.576

 

 

 

L'émeraude, Connaissances actuels et prospectives , AFG, 1998 1998 p230

Beryl-Emerald

1.57

1.578

0.008

0.008

2.68

2.68

 

 

faceted cat's-eye, 3.19ct, chatoyance caused by white fibres

 

 

 

 

Cr-lines

inert

inert

Gems & Gemology 1997 Fall, p214

Beryl-Emerald

1.57

1.579

0.005

0.005

2.69

2.69

 

Chivor mine, Boyaca Department, Colombia

 

1.570

1.571

1.577

1.579

 

 

 

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Beryl-Emerald

1.57

1.577

0.006

0.007

2.65

2.7

saturated green

Chivor region, Colombia

1.02 and 3.81ct

 

 

 

 

 

 

inert to very weak red fluorescence

Gems & Gemology 2002 Winter, p351

Beryl-Emerald

1.57

1.579

0.005

0.006

2.688

2.688

 

Chivor, Colombia

12 stones

 

 

 

 

 

 

 

Gems & Gemology 1982 Fall p130

Beryl-Emerald

1.57

1.575

0.005

0.005

2.68

2.68

emerald green

Emerald Mine, Emmaville, New South Wales, Australia

 

 

 

 

 

broad band at 610nm, general absorption < 454nm

inert

inert

The Journal of Gemmology 1984 Vol XIX, N°4, p320-342

Beryl-Emerald

1.57

1.589

0.006

0.008

0

0

 

Fazenda Boa Esperança, Taua, Ceara, Brazil

 

1.570

1.582

1.577

1.589

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1988 36, Nr 3/4 p133-147

Beryl-Emerald

1.57

1.577

0.007

0.007

2.72

2.72

bluish green

Gachala, Boyaca Province, Colombia

3.51ct

 

 

 

 

 

inert

inert

GIA Gem Database  33872

Beryl-Emerald

1.57

1.576

0.006

0.006

2.7

2.7

 

Gachala, Chivor, Boyaca Department, Colombia

 

 

 

 

 

 

 

 

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Beryl-Emerald

1.57

1.576

0.006

0.006

2.7

2.7

 

Gachala, Colombia

 

1.570

1.570

1.576

1.576

 

red

red

L'émeraude, Connaissances actuels et prospectives , AFG, 1998 1998 p230

Beryl-Emerald

1.57

1.576

0.006

0.006

2.7

2.7

 

Gachala, Colombia

 

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Dez, p65

Beryl-Emerald

1.57

1.584

0.005

0.006

2.7

2.71

 

Muzo mine, Muzo, Boyaca Department, Colombia

 

1.570

1.578

1.580

1.584

 

 

 

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Beryl-Emerald

1.57

1.58

0.005

0.006

2.698

2.698

 

Muzo, Colombia

11 stones

 

 

 

 

 

 

 

Gems & Gemology 1982 Fall p130

Beryl-Emerald

1.57

1.582

0.006

0.006

2.68

2.74

 

Novello Claims, Zimbabwe

 

1.570

1.576

1.576

1.582

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Dez, p65

Beryl-Emerald

1.57

1.589

0.006

0.007

2.7

2.73

 

Taua, Ceara, Brazil

 

1.570

1.582

1.577

1.589

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Dez, p65

Beryl-Emerald

1.571

1.577

0.006

0.006

2.69

2.69

 

Chivor, Colombia

 

 

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

Beryl-Emerald

1.571

1.582

0.007

0.008

2.68

2.71

 

Poona, Australia

 

1.571

1.574

1.578

1.582

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Dez, p65

Beryl-Emerald

1.572

1.578

0.005

0.007

2.693

2.693

 

Poona, Australia

3 stones

 

 

 

 

 

 

 

Gems & Gemology 1982 Fall p130

Beryl-Emerald

1.572

1.578

0.005

0.007

2.68

2.71

 

Poona, West Australia,  Australia

 

1.572

1.573

1.577

1.578

 

 

 

The Australian Gemmologist 1991 Vol 17/12 p488-497

Beryl-Emerald

1.573

1.582

0.005

0.006

2.7

2.72

 

Bom Jesus dos Meiras, Bahia, Brazil

 

1.573

1.576

1.578

1.582

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Dez, p65

Beryl-Emerald

1.573

1.579

0.005

0.006

2.682

2.682

 

Brumado, Bahia, Brazil

3 stones

 

 

 

 

 

 

 

Gems & Gemology 1982 Fall p130

Beryl-Emerald

1.573

1.583

0.007

0.008

2.68

2.71

 

China

 

1.573

1.575

1.580

1.583

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1997 Jun, p109

Beryl-Emerald

1.573

1.585

0.007

0.008

2.75

2.76

 

Egypt

 

1.573

1.577

1.580

1.585

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Dez, p65

Beryl-Emerald

1.574

1.584

0.006

0.007

2.68

2.71

 

Coscuez, Colombia

chelsea  pink to red

1.574

1.578

1.580

1.584

 

inert

inert or slightly pink, orange or red

Gems & Gemology 1986 Summer, p67-79

Beryl-Emerald

1.574

1.597

0.005

0.007

2.7

2.77

 

Habachtal, Austria

 

1.574

1.590

1.582

1.597

 

 

 

Gems & Gemology 2005 Summer p116-148

Beryl-Emerald

1.574

1.597

0.005

0.007

2.73

2.74

 

Habachtal, Austria

chesea : pink to red

1.574

1.590

1.582

1.597

 

 

 

L'émeraude, Connaissances actuels et prospectives , AFG, 1998 1998 p230

Beryl-Emerald

1.574

1.597

0.005

0.007

2.7

2.77

 

Habachtal, Austria

 

1.574

1.590

1.579

1.597

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Dez, p65

Beryl-Emerald

1.574

1.59

0.004

0.009

2.72

2.74

 

Itabira district, Brazil

 

1.574

1.583

1.580

1.590

 

 

 

Gems & Gemology 2005 Summer p116-148

Beryl-Emerald

1.574

1.59

0.004

0.008

2.728

2.742

 

Itabira, Minas Gerais

 

1.574

1.582

1.580

1.590

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1987 Jun, p33-49

Beryl-Emerald

1.574

1.59

0.004

0.008

2.72

2.74

 

Itabira, Minas Gerais, Brazil

 

1.574

1.582

1.580

1.590

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Dez, p65

Beryl-Emerald

1.574

1.581

0.007

0.007

2.754

2.754

 

Kala Guman, India

 

 

 

 

 

 

 

 

Indian Gemmologist 1994 4(3/4),p5-10

Beryl-Emerald

1.574

1.58

0.006

0.006

2.71

2.71

light green

Muzo, Boyaca Province, Bolivia

0.44ct

 

 

 

 

broad absorption below 440nm, lines at 480, 635, 682nm

inert

inert

GIA Gem Database  33869

Beryl-Emerald

1.574

1.584

0.006

0.007

2.71

2.71

 

Muzo, Colombia

 

1.574

1.578

1.581

1.584

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Dez, p65

Beryl-Emerald

1.574

1.588

0.006

0.06

2.68

2.74

 

Panjshir, Afghanistan

 

1.574

1.582

1.580

1.588

 

inert

inert

L'émeraude, Connaissances actuels et prospectives , AFG, 1998 1998 p230

Beryl-Emerald

1.574

1.588

0.006

0.006

2.68

2.74

 

Panjshir Valey, Afghanisten

 

1.574

1.582

1.580

1.588

 

inert

inert

Gems & Gemology 1991 Spring, p26-39

Beryl-Emerald

1.574

1.588

 

 

 

 

light green to green

Panjshir Valley, Afghanistan

 

1.574

1.582

1.580

1.588

 

inertinert

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2004 Dec, p127-141

Beryl-Emerald

1.575

1.59

0.005

0.005

2.68

2.68

 

de Milhou's Reef, Emmaville, New England District, New South Wales, Australia

 

 

 

 

 

 

 

 

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Beryl-Emerald

1.575

1.582

0.006

0.007

2.69

2.71

 

Franquiera, Spain

metasomic zone

1.575

1.576

1.581

1.582

 

 

 

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

Beryl-Emerald

1.575

1.59

0.006

0.008

2.71

2.75

 

Oural, Russia

chelsea:  red to grey

1.575

1.582

1.581

1.590

biotite, phlogopite, actinolite, tremolite, apatite, chromite, fluorite, quartz, rutile, calcite, talc, tourmaline, 2-phase incl, healing fractures

inert

inert

L'émeraude, Connaissances actuels et prospectives , AFG, 1998 1998 p230

Beryl-Emerald

1.575

1.59

0.006

0.008

2.71

2.75

 

Tokowaja, Russia

 

1.575

1.582

1.581

1.590

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Dez, p65

Beryl-Emerald

1.575

1.591

0.007

0.007

2.72

2.75

 

Ural Mountains, Russia

 

1.575

1.584

1.581

1.591

 

 

 

Gems & Gemology 2005 Summer p116-148

Beryl-Emerald

1.575

1.59

0.006

0.008

2.71

2.75

light to medium green

Ural Mountains, Russia

120 stones

1.575

1.582

1.581

1.590

 

 

 

Gems & Gemology 1991 Summer, p 86-99

Beryl-Emerald

1.576

1.584

0.008

0.008

2.8

2.8

 

Anagé, Bahia, Brazil

 

 

 

 

 

 

 

 

Gems & Gemology 1982 Fall p130

Beryl-Emerald

1.576

1.584

0.008

0.008

2.8

2.8

 

Anagé, Bahia, Brazil

 

 

 

 

 

 

 

 

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Beryl-Emerald

1.576

1.584

0.006

0.006

2.71

2.73

 

Capoeirana, Minas Gerais, Brazil

 

1.576

1.578

1.582

1.584

 

 

 

Gems & Gemology 1989 Fall p 150-158

Beryl-Emerald

1.576

1.59

0.006

0.009

2.69

2.75

 

Maji Moto, Tanzania

 

1.576

1.584

1.582

1.590

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Dez, p65

Beryl-Emerald

1.576

1.588

0.006

0.009

2.67

2.7

light to dark green

Panjsher (Panjshir) Valley, Hessa-e-Say District, Panjshir Province, Afghanistan

 

1.576

1.580

1.582

1.588

 

inert

inert

The Journal of Gemmology 2008 Vol 31/ No1-2/p31-39

Beryl-Emerald

1.576

1.579

0.005

0.006

2.68

2.68

 

Serra das Éguas, Brumado, Bahia, Brazil

 

 

 

 

 

 

 

 

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Beryl-Emerald

1.577

1.585

0.007

0.007

2.655

2.665

green

 

 

1.577

1.577

1.583

1.585

 

 

 

Revue de  Gemmologie A.F.G. 1989 Mar, N°98

Beryl-Emerald

1.577

1.589

0.005

0.008

2.7

2.72

 

Carnaiba, Bahia, Brazil

 

1.577

1.582

1.582

1.589

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1988 37, Nr 1/2, p31-47

Beryl-Emerald

1.577

1.59

0.005

0.007

2.7

2.72

 

Carnaiba, Bahia, Brazil

 

1.577

1.583

1.582

1.590

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Dez, p65

Beryl-Emerald

1.577

1.582

0.005

0.005

2.69

2.74

 

Filabusi, Zimbabwe

 

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Dez, p65

Beryl-Emerald

1.577

1.59

0.007

0.009

2.7

2.72

 

Lake Manyara, Tanzania

 

1.577

1.580

1.584

1.590

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 Dez, p65

Beryl-Emerald

1.578

1.584

0.006

0.006

2.71

2.71

 

Colombia Muzo

 

 

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

Beryl-Emerald

1.578

1.585

0.07

0.07

2.72

2.72

green

Ethiopia

1.36ct

 

 

 

 

lines at 700nm

inert

weak red

Gems & Gemology 2012 Fall, p219-220

Beryl-Emerald

1.578

1.597

0.007

0.007

2.72

2.767

green

Habachtal, Austria

chelsea red to pink

1.578

1.590

1.585

1.597

683, 680, 662, 646, 637, band 630-580

inert

inert

Emerald and other beryls, Sinkankas, 1981 

Beryl-Emerald

1.578

1.599

0.006

0.009

2.69

2.78

 

Kafubu area, Zambia

 

1.578

1.591

1.585

1.599

 

inert

usually inert, sometimes faint green

Gems & Gemology 2005 Summer p116-148

Beryl-Emerald

1.578

1.585

0.006

0.006

2.72

2.72

 

Lake Manyara, Tanzania

20 stones

 

 

 

 

 

 

 

Gems & Gemology 1982 Fall p130

Beryl-Emerald

1.578

1.585

0.005

0.006

2.72

2.73

 

Magara, Lake Manyara, Arusha Region, Tanzania

 

1.578

1.580

1.580

1.585

 

 

 

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Beryl-Emerald

1.578

1.584

0.006

0.006

2.74

2.74

green

Muzo, Boyaca Province, Bolivia

0.74ct

 

 

 

 

broad absorption below 440nm, and between 580-620; lines at 480, 635, 682nm

inert

inert

GIA Gem Database  33860

Beryl-Emerald

1.578

1.591

0.008

0.009

2.72

2.74

slightly bluish green to strongly bluish green

near Caiçara do Rio do Vento, Fazenda Bonfim regio, Rio Grande do Norte, Brazil

most stones < 0.20ct,

1.578

1.583

1.587

1.591

lines at 636, 662, 683nm, partial absorption 580-630nm, complete absorption <430nm

inert

inert

Gems & Gemology 2012 Spring, p2-17

Beryl-Emerald

1.578

1.593

0.007

0.007

2.7

2.78