|
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 |
1.602 |
1.63 |
0.028 |
0.028 |
3.03 |
3.03 |
red-violet |
Fowler, St. Lawrence County,
New York |
hexagonite |
|
|
|
|
|
|
|
|
|
Joel Arem, Color Encyclopedia
of Gemstones, 1987
p37 |
|
Tremolite |
1.602 |
1.632 |
0.025 |
0.026 |
2.99 |
3.01 |
bright
green |
Kenya |
|
1.602 |
1.607 |
1.613 |
1.618 |
1.628 |
1.632 |
|
|
|
Joel Arem, Color Encyclopedia
of Gemstones, 1987
p37 |
|
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 |
1.607 |
1.633 |
0.023 |
0.024 |
3.01 |
3.01 |
yellow-green |
Taiwan |
|
1.607 |
1.609 |
|
|
1.630 |
1.633 |
|
|
|
Joel Arem, Color Encyclopedia
of Gemstones, 1987
p37 |
|
Tremolite |
1.608 |
1.631 |
0.023 |
0.023 |
3.01 |
3.01 |
yellow-green |
Lelatema,
Tanzania |
|
1.608 |
1.608 |
1.616 |
1.616 |
1.631 |
1.631 |
|
|
|
Joel Arem, Color Encyclopedia
of Gemstones, 1987
p37 |
|
smaragdite |
1.608 |
1.63 |
0.022 |
0.022 |
|
|
emerald
green |
Merelani,
Tanzania |
|
|
|
|
|
|
|
|
|
|
Joel Arem, Color Encyclopedia
of Gemstones, 1987
p37 |
|
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 |
1.611 |
1.639 |
0.028 |
0.028 |
3.3 |
3.3 |
emerald green
(Cr) |
Tanzania |
|
1.611 |
1.611 |
1.623 |
1.623 |
1.639 |
1.639 |
|
|
|
Joel Arem, Color Encyclopedia
of Gemstones, 1987
p37 |
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
|
|
Tremolite
|
1.605 |
1.636 |
0.027 |
0.027 |
2.99 |
3.05 |
1.605 |
1.613 |
1.616 |
1.624 |
1.630 |
1.636 |
Michael O'Donoghue, Gems: Their
Sources, Descriptions and Identification (2006), 873pp
|
|
Smaragdite |
1.608 |
1.63 |
0.022 |
0.022 |
3.24 |
3.3 |
1.608 |
1.608 |
1.618 |
1.618 |
1.630 |
1.630 |
http://www.geminterest.com
|
|
Smaragdite |
1.7 |
1.7 |
|
|
3.25 |
3.25 |
|
|
|
|
|
|
Gems, R Webster, 5th edition
1994
|
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 |
|
Tremolite |
yellowish
green |
appears to be related to the
presence of trace amounts of V3+ and Cr3+ in the octahedral
sites |
Gems & Gemology Summer 2007
p147 |
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 |
|
hexagonite-Tremolite |
Fowler |
St Lawrence
County |
New York |
USA |
Michael O'Donoghue, Gems: Their
Sources, Descriptions and Identification (2006),
873pp |
CHEMICAL DATA (%)