|
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 |
Clinohumite |
1.62 |
1.648 |
0.028 |
0.029 |
3.21 |
3.21 |
greenish yellow |
Tanzania |
|
1.620 |
1.620 |
|
|
1.648 |
1.649 |
weak absorption at 490nm |
very weak yellow |
inert |
Gems & Gemology 2007 winter,p377 |
Clinohumite |
1.628 |
1.658 |
0.03 |
0.03 |
3.23 |
3.23 |
brown |
Tanzania |
1.72ct |
1.628 |
1.628 |
1.638 |
1.638 |
1.658 |
1.658 |
|
inert |
inert |
ACAM lab
2116 |
Clinohumite |
1.63 |
1.668 |
0.038 |
0.038 |
3.18 |
3.18 |
brownish yellow |
Russia |
0.5 ct |
|
|
|
|
|
|
none |
very strong orangy yellow |
inert |
Gems & Gemology 1988 Spring p 47-48 |
Clinohumite |
1.63 |
1.669 |
0.039 |
0.039 |
3.19 |
3.19 |
bright yellow to orange or brownish-orange |
Pamir Mts, Tajikistan |
high iron and low Ti content |
1.630 |
1.630 |
1.648 |
1.648 |
1.669 |
1.669 |
|
moderate to strong chalky-orange |
inert |
The Journal of Gemmology 2001 Vol 27, N°6, p335-339 |
Clinohumite |
1.63 |
1.665 |
0.031 |
0.033 |
3.223 |
3.23 |
|
Russia |
3 to 4.59ct |
1.630 |
1.633 |
1.644 |
1.644 |
1.662 |
1.665 |
|
|
|
The Journal of Gemmology 1984 Vol 19, N°2, p115-119 |
Clinohumite |
1.631 |
1.668 |
0.037 |
0.037 |
3.18 |
3.18 |
brownish orange |
|
|
1.631 |
1.631 |
1.642 |
1.642 |
1.668 |
1.668 |
none |
moderate to strong slightly chalky orange yellow |
inert |
Zeitschrift der Deutschen Gemmologischen
Gesellschaft 1988 37, Nr 1/2, p53-55 |
Clinohumite |
1.631 |
1.668 |
0.037 |
0.037 |
3.18 |
3.18 |
|
|
|
1.631 |
1.631 |
1.642 |
1.642 |
1.668 |
1.668 |
|
strong chalky orangy yellow |
inert |
Gems & Gemology 1986 winter, p236 |
Clinohumite |
1.632 |
1.666 |
0.033 |
0.034 |
3.21 |
3.23 |
|
Pamir Mts, Tajikistan |
2 stones |
1.632 |
1.632 |
|
|
1.665 |
1.666 |
general absorption at 430nm |
moderate to strong orange-yellow |
inert |
Gems & Gemology 2004 winter, p338 |
Clinohumite |
1.632 |
1.666 |
0.034 |
0.034 |
3.17 |
3.17 |
yellow-brown |
|
0.46ct |
1.632 |
1.632 |
1.638 |
1.638 |
1.666 |
1.666 |
|
orange-yellow |
inert |
ACAM lab
4156 |
Clinohumite |
1.632 |
1.66 |
0.028 |
0.028 |
3.2 |
3.2 |
yellowish orange |
Tajikistan |
2.14ct |
|
|
|
|
|
|
|
weak orange |
inert |
GIA Gem Database 35435 |
Clinohumite |
1.635 |
1.66 |
0.025 |
0.025 |
3.21 |
3.21 |
yellowish orange |
Pamir Mts, Gorno-Badakshan Province, Tajikistan |
1.52ct |
|
|
|
|
|
|
|
moderate yellowish orange |
inert |
GIA Gem Database 35433 |
Clinohumite |
1.635 |
1.67 |
0.035 |
0.035 |
3.21 |
3.21 |
brownish orange |
unknown |
84.23ct |
|
|
|
|
|
|
|
moderate orange to strong chalky yellow |
inert |
Gems & Gemology 2011 Fall, p222 |
Clinohumite |
1.635 |
1.667 |
0.032 |
0.032 |
3.22 |
3.22 |
yellow |
|
0.24ct |
1.635 |
1.635 |
1.648 |
1.648 |
1.667 |
1.667 |
|
|
|
ACAM lab
2066 |
Clinohumite |
1.635 |
1.67 |
0.031 |
0.035 |
3.19 |
3.2 |
|
Vietnam |
0.32ct and 0.54ct, biaxal positive |
1.635 |
1.639 |
|
|
1.670 |
1.670 |
|
weak orange |
inert |
The Journal of Gemmology 2016 35 (4), p 276-277 |
Clinohumite |
1.64 |
1.671 |
0.031 |
0.031 |
3.35 |
3.35 |
red-brown |
Kotui River, Taymyr, Siberia, Russia |
up to 2 ct |
1.640 |
1.640 |
1.654 |
1.654 |
1.671 |
1.671 |
|
inert |
inert |
The Journal of Gemmology 2001 Vol 27, N°6, p335-339 |
Clinohumite |
1.646 |
1.67 |
0.024 |
0.024 |
3.21 |
3.21 |
brownish orange |
|
transparent |
|
|
|
|
|
|
cutoff 430nm |
strong orange-yellow |
inert |
The Journal of Gemmology 2007 30, 5/6, p303-306 |
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 |
Clinohumite - low Fe% |
1.62 |
1.668 |
0.024 |
0.037 |
3.15 |
3.35 |
1.620 |
1.638 |
1.636 |
1.636 |
1.648 |
1.668 |
Tables of Gemstone Identification, Roger Dedeyne,
Ivo Quintens, 2007 |
Clinohumite |
1.62 |
1.73 |
0.022 |
0.038 |
3.15 |
3.35 |
|
|
|
|
|
|
Gemmo.eu
|
Clinohumite |
1.623 |
1.651 |
0.024 |
0.036 |
3.18 |
3.18 |
1.625 |
1.632 |
1.636 |
1.647 |
1.659 |
1.668 |
Gems, R Webster, 5th edition 1994 |
Clinohumite - low Fe% |
1.623 |
1.667 |
0.024 |
0.037 |
3.13 |
3.35 |
1.623 |
1.632 |
|
|
1.651 |
1.667 |
Bestimmungstabellen für Edelsteine,
Birgit Günther, 2008 |
Clinohumite |
1.625 |
1.698 |
0.027 |
0.037 |
3.07 |
3.35 |
1.623 |
1.664 |
|
|
1.651 |
1.698 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
Clinohumite |
1.625 |
1.671 |
0.024 |
0.039 |
3.18 |
3.35 |
1.625 |
1.640 |
1.636 |
1.654 |
1.653 |
1.671 |
Gemmological Tables, Ulrich Henn,
2004 |
Clinohumite |
1.627 |
1.674 |
0.028 |
0.041 |
3.17 |
3.35 |
1.627 |
1.638 |
1.639 |
1.643 |
1.661 |
1.674 |
http://www.geminterest.com |
Clinohumite |
1.629 |
1.674 |
0.028 |
0.041 |
3.17 |
3.35 |
1.629 |
1.638 |
1.662 |
1.643 |
1.662 |
1.674 |
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
Clinohumite |
1.629 |
1.674 |
0.028 |
0.041 |
3.17 |
3.35 |
|
|
|
|
|
|
http://www.gemmology.be |
Clinohumite |
1.629 |
1.674 |
0.028 |
0.041 |
3.17 |
3.35 |
1.629 |
1.638 |
1.662 |
1.643 |
1.662 |
1.674 |
Tables of Gemstone Identification, Roger Dedeyne,
Ivo Quintens, 2007 |
Clinohumite - high Fe% |
1.664 |
1.698 |
0.034 |
0.034 |
3.13 |
3.18 |
|
|
|
|
|
|
Bestimmungstabellen für Edelsteine,
Birgit Günther, 2008 |
Clinohumite - high Fe% |
1.664 |
1.698 |
0.034 |
0.034 |
3.15 |
3.35 |
|
|
|
|
|
|
Tables of Gemstone Identification, Roger Dedeyne,
Ivo Quintens, 2007 |
CAUSE OF
COLOUR
MINERAL
INCLUSIONS
Inclusion |
Stone |
Reference |
apatite |
Clinohumite |
The Journal of Gemmology, 2016, Vol35, N°4 p 279 |
LOCALITIES
CHEMICAL DATA
Stone |
Colour |
Locality |
Reference |
SiO2 |
Al2O3 |
MnO |
MgO |
FeO |
TiO2 |
CaO |
K2O |
H2O |
F |
|
Clinohumite |
|
|
Russia |
Zeitschrift der Deutschen Gemmologischen
Gesellschaft, 1988, 37, Nr 1/2, 54 |
37.52 |
|
|
57.45 |
0.22 |
2.5 |
|
|
|
2.8 |
Clinohumite |
orange |
Pamir Mts |
Tajikistan |
The Journal of Gemmology 2001, Vol27, N°6, p337 |
37.47 |
|
0.02 |
57.12 |
0.25 |
2.54 |
0.01 |
|
|
2.25 |
Clinohumite |
greenish yellow |
|
Tanzania |
Gems & Gemology winter 2007, p
377-378 |
37.57 |
0.18 |
|
58.39 |
0.31 |
0.42 |
|
0.02 |
2.41 |
1.01 |
Clinohumite |
brown-red |
Taymyr region, Siberia |
Russia |
The Journal of Gemmology 2001, Vol27, N°6, p337 |
37.05 |
|
0.49 |
53.19 |
5.48 |
0.77 |
0.03 |
|
|
2.18 |