Gemsdat
 

                Home            Gemstones

 

     

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

Spodumene - Hiddenite

1.655

1.67

0.015

0.015

3.156

3.185

green

Kataragama, Sri Lanka

 

 

 

 

 

 

 

 

 

 

The Australian Gemmologist 1986 Vol 16, Nr 2, p35-40

Spodumene - Kunzite

1.658

1.67

0.012

0.012

3.25

3.25

reddish purple

Madagascar

21.40ct

 

 

 

 

 

 

 

inert

orange

GIA Gem Database  34161

Spodumene

1.659

1.672

0.013

0.013

3.18

3.18

colourless

 

 

 

 

 

 

 

 

 

 

 

ACAM labo 

Spodumene

1.659

1.671

0.011

0.011

 

 

green-yellow, pink-violet, colourless

Laghman, Nuristan, Afghanistan

 

1.659

1.660

1.664

1.664

1.670

1.671

 

 

 

The Australian Gemmologist 2007 Vol23, N°2, p51-57

Spodumene - Hiddenite

1.66

1.677

0.016

0.016

3.2

3.21

 

Hiddenite, North Carolina, USA

chelsea: pink

 

 

 

 

 

 

band at 440nm, line at 670nm

inert

inert

Gems & Gemology 2003 fall p 228

Spodumene

1.66

1.677

0.016

0.016

 

 

pink-yellow, greenish-yellow

Khauraz, Laghman Province, Afghanistan

 

1.660

1.661

 

 

1.676

1.677

band at 438nm

inert

weak to moderate orange

Gems & Gemology 2002 Fall p 270

Spodumene - Kunzite

1.66

1.676

0.016

0.016

3.17

3.17

pink

Santa Maria de Suaçui, Minas Gerais, Brazil

113.32 ct, cat's-eye

1.660

1.660

1.667

1.667

1.676

1.676

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1997 Jun, p64-65

Spodumene - Hiddenite

1.66

1.68

0.02

0.02

3.2

3.2

apple green to light green

Nuristan, Afghanistan

 

1.660

1.660

1.669

1.669

1.680

1.680

 

inert

inert

http://www.geminterest.com 2008

Spodumene - Hiddenite

1.66

1.675

0.015

0.015

3.17

3.17

emerald green

 

16.17 ct, strong thermoluminescence at low temperature

 

 

 

 

 

 

 

strong pink

strong orange

Gems & Gemology 2010 winter, p322-323

Spodumene

1.66

1.672

0.012

0.012

3.23

3.23

yellow

Afghanistan

21.81ct

 

 

 

 

 

 

line at 445nm

inert

weak orange

GIA Gem Database  34174

Spodumene - Hiddenite

1.66

1.674

0.014

0.014

3.17

3.17

bluish green

 

29.20ct

 

 

 

 

 

 

line at 445nm

very weak yellow

orange

GIA Gem Database  34176

Spodumene - Kunzite

1.66

1.675

0.015

0.015

3.19

3.19

red purple

Santa Maria do Suaçui, Minas Gerais, Brazil

22.98ct

 

 

 

 

 

 

 

moderate purple

moderate orange

GIA Gem Database  34287

Spodumene - Kunzite

1.66

1.678

0.018

0.018

3.22

3.22

almost colourless, pinkish

 

1.67ct

 

 

 

 

 

 

 

light orange

light orange

ACAM labo  175

Spodumene - Kunzite

1.66

1.675

0.015

0.015

3.19

3.19

pinkish

 

8.46ct

1.660

1.660

1.665

1.665

1.675

1.675

 

pink

orange

ACAM lab  1337

Spodumene - Kunzite

1.66

1.679

0.019

0.019

3.2

3.2

pink

Afghanistan

8.94ct

1.660

1.660

1.668

1.669

1.679

1.679

 

inert

orange

ACAM lab 

Spodumene

1.66

1.675

0.015

0.015

3.185

3.185

light blue

 

35ct

1.660

1.660

1.668

1.668

1.675

1.675

 

 

 

The Journal of Gemmology 1971 N°5, p155

Spodumene - Hiddenite

1.662

1.678

0.016

0.016

3.25

3.25

 

Waigal, Wasdigram,  Afghanistan

Cr-V-bearing, Chelsea filter : weak grayish pink

 

 

 

 

 

 

nihil

inert

inert

Gems & Gemology 2007 fall, p265-266

Spodumene - Hiddenite

1.665

1.677

0.012

0.012

3.26

3.26

yellowish green

Barra do Cuité, Conselheiro Pena, Minas Gerais, Brazil

55.50ct

 

 

 

 

 

 

line at 444nm

weak green

very weak yellow

GIA Gem Database  34255

 

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

Spodumene

1.651

1.682

0.012

0.027

3

3.38

1.651

1.670

 

 

1.667

1.682

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

Spodumene - Hiddenite

1.653

1.682

0.014

0.026

3.14

3.2

1.653

1.670

1.660

1.669

1.665

1.682

http://www.geminterest.com 

Spodumene - Kunzite

1.653

1.682

0.014

0.027

3

3.2

1.653

1.670

1.660

1.669

1.665

1.682

http://www.geminterest.com 

Spodumene - Hiddenite

1.653

1.682

0.014

0.027

3

3.2

 

 

 

 

 

 

http://www.gemmology.be 

Spodumene

1.653

1.682

0.014

0.027

3

3.2

 

 

 

 

 

 

http://www.gemmology.be 

Spodumene

1.653

1.682

0.013

0.027

3

3.2

1.653

1.670

1.660

1.669

1.665

1.682

http://www.geminterest.com 

Spodumene

1.653

1.682

0.014

0.027

3

3.24

1.653

1.670

1.660

1.669

1.665

1.682

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

Spodumene

1.655

1.681

0.015

0.016

3.15

3.24

1.655

1.665

 

 

1.671

1.681

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Spodumene - Kunzite

1.655

1.681

0.014

0.016

3.15

3.21

 

 

 

 

 

 

Gemology Tools Professional 2010

Spodumene

1.657

1.679

0.014

0.016

3.15

3.2

1.657

1.663

1.659

1.665

1.673

1.679

Gemmological Tables, Ulrich Henn, 2004 

Spodumene - Hiddenite

1.657

1.681

0.014

0.014

3.15

3.21

 

 

 

 

 

 

Gemology Tools Professional 2010

Spodumene

1.657

1.681

0.014

0.014

3.15

3.21

 

 

 

 

 

 

Gemology Tools Professional 2010

Spodumene

1.659

1.68

0.014

0.018

3.15

3.2

 

 

 

 

 

 

Gemmo.eu 

Spodumene

1.66

1.678

 

 

3.17

3.23

 

 

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Spodumene

1.66

1.681

0.014

0.016

3.15

3.21

 

 

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Spodumene

1.66

1.675

0.015

0.015

3.17

3.19

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

Spodumene

 

 

0.014

0.027

3

3.2

1.653

1.670

1.660

1.669

1.665

1.682

Joel Arem, Color Encyclopedia of Gemstones, 1987 

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Spodumene - Kunzite

purple to pink

Mn³+ in tetrahedral coordination; Mn³+ in octahedral coordination

Gems & Gemology Summer 1988

Spodumene - Hiddenite

emerald green

Cr³+ in octahedral coordination with also unstable Mn4+ colour center; V³+ in octahedral coordination

Gems & Gemology Summer 1988

Spodumene - Hiddenite

pale green

unstable Mn4+ in octahedral coordination plus Fe³+ -> Fe³+ charge transfer; Fe³+ in octahedral coordination

Gems & Gemology Summer 1988

Spodumene

greenish yellow to brownish orange

colour center of unknown structure

Gems & Gemology Summer 1988

 

MINERAL INCLUSIONS

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

kunzite-Spodumene

 

Nilaw-Kolum Pegmatite Field

Laghman (Lagman; Nuristan) Province

Afghanistan

Australian Gemmologist 23 (2), 51-57

hiddenite-Spodumene

Waigal

Wadigram

Nuristan Province

Afghanistan

Gems & emology 2007 fall p265

Spodumene

Antsirabé

Vakinankaratra region (Betafo - Antsirabé region)

Antananarivo Province

Madagascar

Gems & Gemology 2000 winter p325

kunzite-Spodumene

Antsirabé

Vakinankaratra Region (Betafo - Antsirabé region)

Antananarivo Province

Madagascar

Gemmologie, Dez 1999,p196

kunzite-Spodumene

Ilakaka gem deposit, Ilakaka, Departementa Ranohira

Horombe region

Fianarantsoa Province

Madagascar

Gemmologie, Dez 1999,p196

Spodumene

Ilakaka Commune, Ranohira Department

Horombe region

Fianarantsoa Province

Madagascar

Gems & Gemology 2000 winter p325

Spodumene

Kataragama

Monaragala

Southern Province

Sri Lanka

Gems & Gemology 2000 winter p325

kunzite-Spodumene

Elisabeth R mine, Pala District

San Diego County

California

USA

Gems & Gemology 2001 fall p231

 

CHEMICAL DATA

%

Stone

Colour

Locality

Reference

SiO2

Al2O3

spodumene

green-yellow

Laghman, Nuristan

Afghanistan

The Australian Gemmologist 2007, Vol23, N°2,p55

62.75

26.62

spodumene

violet-pink

Laghman, Nuristan

Afghanistan

The Australian Gemmologist 2007, Vol23, N°2,p55

63.93

27.13

 

PPM

Stone

Colour

Locality

Reference

V

Fe

Cr

Mn

Spodumene - Hiddenite

green

 

Afghanistan

Gems & Gemology 2007 Fall p266

72

6920

282

1450

Spodumene - Hiddenite

green

 

Afghanistan

Gems & Gemology 2007 Fall p266

63

6720

256

12420

Spodumene - Hiddenite

yellow-green

 

Afghanistan

Gems & Gemology 2007 Fall p266

59

7130

143

1530