|
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 |
Calcite |
1.48 |
1.63 |
0.15 |
0.15 |
2.71 |
2.71 |
blue |
Myanmar |
cat's eye, cabochon, 19.96 ct, translucent |
|
|
|
|
|
|
|
ACAM lab
967 |
Calcite |
1.48 |
1.66 |
0.18 |
0.18 |
2.65 |
2.65 |
yellowish white to a deeper brownish yellow |
|
beads, spot RI |
|
|
|
|
|
|
|
Gems & Gemology 1986 Spring, p46-47 |
Calcite |
1.48 |
1.66 |
0.18 |
0.18 |
2.72 |
2.72 |
light green, translucent |
Pakistan |
cabochon, cat's-eye, 57,60 ct |
|
|
|
|
|
inert |
inert |
Gems & Gemology 2015 Summer,
p199-200 |
Calcite |
1.486 |
1.658 |
0.172 |
0.172 |
2.72 |
2.72 |
orangy yellow |
Rosarito Beach, Baja California, Mexico |
27.90ct |
|
|
|
|
|
moderate orangy yellow |
strong yellow |
GIA Gem Database 34439 |
Calcite |
1.486 |
1.658 |
0.172 |
0.172 |
2.75 |
2.75 |
purplish red |
Congo |
5.42ct |
|
|
|
|
no features |
inert |
inert |
GIA Gem Database 35516 |
Calcite |
1.488 |
1.659 |
0.171 |
0.171 |
2.75 |
2.75 |
brownish-orange |
Erongo, Namibia |
3.03ct |
|
|
|
|
|
white |
white |
http://www.spec4gem.info/index.php 2016 |
Calcite |
1.49 |
1.658 |
0.168 |
0.168 |
2.75 |
2.75 |
purplish red (cobaltocalcite) |
Spain |
7.93ct |
|
|
|
|
broad absorption below 420nm |
weak yellow |
weak orangy yellow |
GIA Gem Database 35428 |
Calcite |
1.49 |
1.65 |
|
|
2.73 |
2.73 |
orangy-red |
|
10.45ct, cabochon, coloured by chalcotrichite inclusions, spot RI |
|
|
|
|
Lines at 500, 590, and 610 nm |
weak, moderately chalky reddish orange |
weak red |
Gems & Gemology 1998 Fall, p127 |
Calcite |
1.49 |
1.66 |
0.17 |
0.17 |
2.7 |
2.7 |
reddish purple, purplish pink (cobaltocalcite) |
|
|
|
|
|
|
|
inert |
very weak purplish pink, moderate orangy pink |
Gems & Gemology 2015 Spring, p58-59 |
Calcite |
1.49 |
1.658 |
0.168 |
0.168 |
2.71 |
2.71 |
colourless |
Mexico |
18.59ct |
|
|
|
|
no features |
inert |
inert |
GIA Gem Database 35416 |
Calcite |
1.49 |
1.66 |
|
|
2.7 |
2.7 |
pink |
Switserland |
cabochon 5cm, polycrystalline, cobaltoan calcite |
|
|
|
|
|
inert |
very weak purplish |
The Journal of Gemmology 2019 36(8), p685-686 |
Calcite |
1.492 |
1.652 |
0.16 |
0.16 |
2.69 |
2.7 |
bluish green |
Pakistan |
translucent, cabochons 56.39ct, 58.32ct and 25.06ct |
|
|
|
|
|
|
|
Zeitschrift der Deutschen Gemmologischen
Gesellschaft 2018 67/1-2 p3-5 |
Calcite |
1.493 |
1.655 |
0.162 |
0.162 |
2.76 |
2.76 |
red-purple |
Spain |
6.21ct, translucent |
|
|
|
|
broad absorption below 420 and between 520-560nm, line at 485 |
inert |
weak violet |
GIA Gem Database 35429 |
Calcite |
1.52 |
1.658 |
0.138 |
0.138 |
2.72 |
2.72 |
very light yellowish orange |
Mexico |
23.58ct |
|
|
|
|
|
inert |
inert |
GIA Gem Database 35415 |
Calcite |
1.52 |
1.668 |
0.148 |
0.148 |
2.72 |
2.72 |
yellowish orange |
Czech Republic |
33.52ct |
|
|
|
|
|
moderate orange |
strong yellowish orange |
GIA Gem Database 35308 |
Calcite |
1.56 |
|
|
|
2.72 |
2.72 |
green and orangy yellow |
Baluchistan, Pakistan |
16.77 ct green cabochon, 32.06 ct orangy cabochon, spot RI, large Biref
blink |
|
|
|
|
|
orangy: yellow, green : inert |
orangy: yellow, green : inert |
Gems & Gemology 2012 Fall, p217-218 |
TABLES
Stone |
RI
min |
RI
max |
Biref
min |
Biref
max |
Dens
min |
Dens
max |
ne
min |
ne
max |
no
min |
no
max |
Reference |
Calcite |
1.484 |
1.66 |
0.154 |
0.174 |
2.65 |
2.75 |
|
|
|
|
Gemmo.eu |
Calcite |
1.486 |
1.658 |
0.172 |
0.172 |
2.71 |
2.71 |
|
|
|
|
John Sinkakas, Gemstone and mineral data
book,1972 |
Calcite |
1.486 |
1.658 |
0.172 |
0.172 |
2.69 |
2.71 |
|
|
|
|
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
Calcite |
1.486 |
1.74 |
0.172 |
0.19 |
2.7 |
2.72 |
1.486 |
1.552 |
1.658 |
1.740 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
Calcite |
1.486 |
1.658 |
0.172 |
0.172 |
2.71 |
2.71 |
1.486 |
1.486 |
1.658 |
1.658 |
Gemmological Tables, Ulrich Henn,
2004 |
Calcite |
1.486 |
1.74 |
0.172 |
0.19 |
2.71 |
2.94 |
|
|
|
|
http://www.gemmology.be |
Calcite |
1.486 |
1.658 |
0.172 |
0.172 |
2.7 |
2.72 |
|
|
|
|
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
Calcite |
1.486 |
1.74 |
0.14 |
0.19 |
2.6 |
2.8 |
1.486 |
1.550 |
1.650 |
1.740 |
http://www.geminterest.com |
Calcite |
1.486 |
1.74 |
0.172 |
0.19 |
2.71 |
2.94 |
1.486 |
1.550 |
1.658 |
1.740 |
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
Calcite |
1.486 |
1.658 |
|
|
2.71 |
2.71 |
|
|
|
|
Gems, R Webster, 5th edition 1994 |
Calcite |
1.486 |
1.74 |
0.172 |
0.19 |
2.71 |
2.94 |
1.486 |
1.550 |
1.658 |
1.740 |
Tables of Gemstone Identification, Roger Dedeyne,
Ivo Quintens, 2007 |
Calcite |
1.486 |
1.658 |
0.172 |
0.172 |
2.65 |
2.75 |
|
|
|
|
Gemology Tools Professional 2010 |
CAUSE OF
COLOUR
Stone |
Colour |
Cause
of colour |
Reference |
Calcite |
blue, amber |
natural radiation |
http://minerals.caltech.edu |
Calcite |
pink |
Co²+ |
Gems & Gemology Summer 1988 |
Calcite |
pink |
Co²+ in octahedral coordination |
Alain Abréal, juillet 2002 |
MINERAL
INCLUSIONS
Inclusion |
Stone |
Reference |
boulangerite |
Calcite |
www.mindat.org |
chalcopyrite |
Calcite |
E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones,
volume 3 |
conichalcite |
Calcite |
E.J. Gübelin and J.I. Koivula, Photoatlas of inclusions in Gemstones,
volume 2 (2005) |
copper |
Calcite |
www.mindat.org |
cuprite |
Calcite |
Gems & Gemology 1998 Fall, p127 |
dioptase |
calcite |
The Journal of Gemmology 1994, 24, 1, p46 |
polydymite |
Calcite |
|
realgar |
Calcite |
http://www.johnbetts-fineminerals.com |
tourmaline |
Calcite |
Dietrich, The tourmaline group, 1985 |
LOCALITIES
STONE |
LOCALITIES |
REFERENCE |
|||
Calciet |
Ihosy, Ihosy Department |
Horombe Region |
Fianarantsoa Province |
Madagascar |
Gemmologie, Dez 1999,p196 |
CHEMICAL DATA