|
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 |
1.655 |
1.669 |
0.014 |
0.014 |
3.25 |
3.25 |
yellowish green |
|
|
|
|
|
|
|
|
|
weak yellow |
weak orange |
GIA Gem Database 34182 |
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 - Kunzite |
1.658 |
1.672 |
0.014 |
0.014 |
3.24 |
3.24 |
purple |
Afghanistan |
17.09ct |
|
|
|
|
|
|
no features |
inert |
inert |
GIA Gem Database 34162 |
Spodumene - Kunzite |
1.658 |
1.671 |
0.013 |
0.013 |
3.19 |
3.19 |
purple |
Madagascar |
17.20ct |
|
|
|
|
|
|
no features |
moderate violet |
moderate orange |
GIA Gem Database 34417 |
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 |
1.659 |
1.67 |
0.011 |
0.011 |
3.23 |
3.23 |
light bluish violet |
Afghanistan |
23.11ct |
|
|
|
|
|
|
no feature |
moderate pinkish violet |
moderate yellow/orange |
GIA Gem Database 34169 |
Spodumene |
1.659 |
1.675 |
0.026 |
0.026 |
3.23 |
3.23 |
light greenish yellow |
Brazil |
56.34ct |
|
|
|
|
|
|
no feature |
very weak yellow |
weak orange |
GIA Gem Database 34175 |
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 - Kunzite |
1.66 |
1.673 |
0.013 |
0.013 |
3.27 |
3.27 |
purplish red |
Pala, California, USA |
25.53ct |
|
|
|
|
|
|
no features |
inert |
moderate orange |
GIA Gem Database 35150 |
Spodumene - Kunzite |
1.66 |
1.676 |
0.016 |
0.016 |
|
|
pink |
|
3051 ct, named "Fragility of the eternal" , 914 facets |
|
|
|
|
|
|
|
|
|
Gems & Gemology 2020 Summer p306 |
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 |