|
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 |
|
Crocoite |
2,29 |
2,66 |
0,35 |
0,35 |
5,9 |
6,1 |
|
|
transparent, translucent,
3.94 ct and 1.14 ct |
2,29 |
2,31 |
2,36 |
2,37 |
2,66 |
2,66 |
|
inert |
inert |
The Australian
Gemmologist 2004 Vol 22,N°2, p59-63 |
|
Crocoite |
|
|
|
|
6 |
6 |
orange |
Tasmania, Australia |
0,35ct, transparent, RI
over the limits, strong birefringence |
|
|
|
|
|
|
|
inert |
inert |
The Journal of Gemmology
2022 38(1), p9 |
|
Crocoite |
|
|
|
|
6,05 |
6,05 |
orange |
|
|
|
|
|
|
|
|
|
|
|
ACAM labo |
|
Crocoite |
|
|
|
|
6,2 |
6,2 |
|
Dundas, Tasmania,
Australia |
5.40ct, translucent |
|
|
|
|
|
|
broad absorption below
560nm |
inert |
inert |
GIA Gem Database 35441 |
|
Crocoite |
|
|
|
|
6,28 |
6,28 |
red-orange |
Dundas, Tasmania,
Australia |
4.73ct, transparent |
|
|
|
|
|
|
broad absorption below
560nm |
inert |
inert |
GIA Gem Database 35440 |
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 |
|
Crocoite |
2.29 |
2.66 |
0.27 |
0.35 |
5.9 |
6.1 |
|
|
|
|
|
|
http://www.gemmology.be |
|
Crocoite |
2.29 |
2.66 |
0.27 |
0.27 |
5.9 |
6.1 |
2.290 |
2.310 |
2.360 |
2.360 |
2.660 |
2.660 |
http://www.geminterest.com |
|
Crocoite |
2.29 |
2.66 |
0.27 |
0.27 |
5.9 |
6.1 |
2.290 |
2.310 |
2.360 |
2.360 |
2.660 |
2.660 |
Joel Arem, Color
Encyclopedia of Gemstones, 1987 |
|
Crocoite |
2.29 |
2.66 |
0.27 |
0.27 |
5.9 |
6.1 |
2.290 |
2.310 |
|
|
2.660 |
2.660 |
Tables of
Gemstone Identification, Roger Dedeyn, Ivo Quintens, 2007 |
|
Crocoite |
2.31 |
2.66 |
0.35 |
0.35 |
5.96 |
6.02 |
|
|
|
|
|
|
John Sinkakas,
Gemstone and mineral data book,1972 |
|
Crocoite |
2.31 |
2.66 |
0.35 |
0.35 |
5.99 |
6.01 |
|
|
|
|
|
|
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
|
Crocoite |
2.31 |
2.66 |
0.35 |
0.35 |
5.9 |
6.1 |
2.310 |
2.310 |
2.370 |
2.370 |
2.660 |
2.660 |
Gemmological Tables, Ulrich Henn,
2004 |
|
Crocoite |
2.31 |
2.66 |
0.35 |
0.35 |
5.9 |
6.1 |
|
|
|
|
|
|
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
|
Crocoite |
2.31 |
2.66 |
0.35 |
0.35 |
5.9 |
6.1 |
2.310 |
2.310 |
2.370 |
2.370 |
2.660 |
2.660 |
Gems, R Webster,
5th edition 1994 |
CAUSE OF
COLOUR
|
Stone |
Colour |
Cause
of colour |
Reference |
|
Crocoite |
yellow to red |
O²-->Cr6+ charge transfer |
Gems & Gemology Summer 1988 |
MINERAL
INCLUSIONS
LOCALITIES
|
STONE |
LOCALITIES |
REFERENCE |
|||
|
Crocoiet |
West Comet Mine |
Dundas |
Tasmania |
Australië |
Lapis 2/1989 |
CHEMICAL DATA