|
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 |
|
Tremolite |
1.6 |
1.62 |
0.02 |
0.02 |
3 |
3 |
|
Fowler, St. Lawrence County, New York. |
cat's-eye, hexagonite, 1.86ct and 2.72ct, spot RI |
|
|
|
|
|
|
|
|
|
Gems & Gemology 1985 Summer, p110 |
|
Tremolite |
1.604 |
1.632 |
0.028 |
0.028 |
3.03 |
3.03 |
apple green |
Tanzania |
|
1.604 |
1.604 |
1.619 |
1.619 |
1.632 |
1.632 |
absorption of red and blue |
weak to good: yellow-green |
inert |
http://www.geminterest.com 2008 |
|
Tremolite |
1.605 |
1.634 |
0.029 |
0.029 |
2.96 |
2.96 |
yellow-green |
Pakistan |
|
|
|
|
|
|
|
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2004 Dec, p123 |
|
Tremolite |
1.61 |
1.635 |
0.025 |
0.025 |
3.07 |
3.07 |
yellowish green |
Merelani, Tanzania |
|
|
|
|
|
|
|
none |
greenish yellow |
weak orange |
Gems & Gemology 2007 summer p146-148 |
|
Tremolite |
1.61 |
1.635 |
0.025 |
0.025 |
2.97 |
2.97 |
yellowish green |
Tanzania |
0.32 ct |
|
|
|
|
|
|
bands at 435 and 650nm |
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2013 62/1-2, Jun, p34 |
|
Tremolite |
1.61 |
1.638 |
0.028 |
0.028 |
3.01 |
3.01 |
light greyish green to greyish brown |
Badakshan, Afghaniqtan |
cabochon 2.09ct, cat's-eye |
|
|
|
|
|
|
|
inert |
inert |
The Journal of Gemmology 2018 Vol 36, (1), p14 |
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 |
|
Tremolite |
1.56 |
1.643 |
0.017 |
0.028 |
2.9 |
3.2 |
1.560 |
1.562 |
1.613 |
1.613 |
1.624 |
1.643 |
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
|
Tremolite |
1.56 |
1.643 |
0.017 |
0.028 |
2.9 |
3.3 |
|
|
|
|
|
|
http://www.gemmology.be |
|
Tremolite |
1.56 |
1.643 |
0.017 |
0.028 |
2.9 |
3.2 |
1.560 |
1.613 |
1.613 |
1.624 |
1.624 |
1.643 |
http://www.geminterest.com |
|
Tremolite |
1.56 |
1.643 |
|
|
|
|
1.560 |
1.562 |
1.613 |
1.613 |
1.624 |
1.643 |
Tables of Gemstone Identification, Roger Dedeyne,
Ivo Quintens, 2007 |
|
Tremolite |
1.56 |
1.643 |
0.17 |
0.028 |
2.9 |
3.2 |
|
|
|
|
|
|
Gemology Tools Professional 2010 |
|
Tremolite |
1.599 |
1.637 |
0.023 |
0.028 |
2.99 |
3.02 |
1.599 |
1.613 |
1.613 |
1.626 |
1.631 |
1.637 |
Tables of Gemstone Identification, Roger Dedeyne,
Ivo Quintens, 2007 |
|
Tremolite |
1.6 |
1.642 |
0.022 |
0.03 |
2.9 |
3 |
|
|
|
|
|
|
John Sinkakas, Gemstone and mineral data
book,1972 |
|
Tremolite |
1.6 |
1.635 |
0.02 |
0.02 |
2.96 |
2.98 |
1.600 |
1.608 |
|
|
1.620 |
1.635 |
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
|
Tremolite |
1.6 |
1.62 |
0.02 |
0.02 |
2.98 |
2.98 |
|
|
|
|
|
|
Gems, R Webster, 5th edition 1994 |
|
Tremolite |
1.6 |
1.637 |
0.024 |
0.029 |
2.94 |
3.15 |
|
|
|
|
|
|
Gemmo.eu 2013 |
|
Tremolite |
1.602 |
1.632 |
0.022 |
0.028 |
2.95 |
3.07 |
|
|
|
|
|
|
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
|
Tremolite |
1.602 |
1.643 |
0.021 |
0.027 |
2.9 |
3.2 |
1.602 |
1.608 |
|
|
1.624 |
1.643 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
|
Tremolite |
1.602 |
1.631 |
0.023 |
0.026 |
2.99 |
3.01 |
1.602 |
1.608 |
1.613 |
1.619 |
1.628 |
1.631 |
Gemmological Tables, Ulrich Henn,
2004 |
CAUSE OF
COLOUR
|
Stone |
Colour |
Cause
of colour |
Reference |
|
Tremolite |
pink |
Mn³+
in octahedral coordination |
Gems & Gemology Summer 1988 |
|
Tremolite |
violet |
Mn³+
in octahedral coordination |
Alain Abréal, juillet 2002 |
MINERAL
INCLUSIONS
LOCALITIES
|
STONE |
LOCALITIES |
REFERENCE |
|||
|
Tremolite |
Merelani Hills (Mererani), Umba Valley |
Lelatema Mts |
Arusha Region |
Tanzania |
Gemmologie, 1997, Mar, p31 |
|
Tremolite |
|
Lamartine |
|
Uganda |
Gemmologie, Sep 1996, p136 |
CHEMICAL DATA
(%)