|
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 |
Thaumasite |
1.467 |
1.51 |
0.03 |
0.038 |
1.88 |
1.9 |
|
Black Rock mine, South Africa |
|
1.467 |
1.480 |
1.505 |
1.510 |
|
|
|
The Journal of Gemmology 1991 Vol 22, No 6 p334-336 |
Thaumasite |
1.467 |
1.51 |
0.03 |
0.038 |
1.88 |
1.91 |
colourless to pale yellowish |
|
|
1.467 |
1.480 |
1.505 |
1.510 |
|
|
|
Zeitschrift der Deutschen Gemmologischen
Gesellschaft 1991 Apr, p67-68 |
Thaumasite |
1.47 |
1.515 |
0.045 |
0.045 |
1.9 |
1.9 |
colourless |
|
1.72ct, radiating fibrous inclusions, reflective films, tiny crystal
inclusions |
|
|
|
|
|
inert |
inert |
Gems & Gemology 2017 Spring, p90 |
TABLES
Stone |
RI min |
RI max |
Biref min |
Biref max |
Dens min |
Dens max |
ne min |
ne max |
no min |
no max |
Reference |
Thaumasite |
1.457 |
1.508 |
0.034 |
0.038 |
1.87 |
1.93 |
|
|
|
|
Gemmo.eu 2017 |
Thaumasite |
1.458 |
1.47 |
0.036 |
0.036 |
1.9 |
1.9 |
1.458 |
1.470 |
1.498 |
1.507 |
Michael O'Donoghue, Gems: Their Sources, Descriptions and Identification
(2006), 873pp |
Thaumasite |
1.464 |
1.507 |
0.036 |
0.036 |
1.91 |
1.91 |
|
|
|
|
http://www.gemmology.be |
Thaumasite |
1.464 |
1.507 |
0.036 |
0.036 |
1.91 |
1.91 |
1.464 |
1.468 |
1.500 |
1.507 |
Joel Arem, Color Encyclopedia of Gemstones, 1987 |
Thaumasite |
1.464 |
1.507 |
0.036 |
0.036 |
1.91 |
1.91 |
1.464 |
1.468 |
1.500 |
1.507 |
http://www.geminterest.com |
Thaumasite |
1.464 |
1.5 |
0.031 |
0.043 |
1.88 |
1.9 |
1.500 |
1.507 |
1.464 |
1.468 |
Gems, R Webster, 5th edition 1994 |
Thaumasite |
1.464 |
1.511 |
0.03 |
0.038 |
1.87 |
1.91 |
1.464 |
1.480 |
1.500 |
1.511 |
Bestimmungstabellen für Edelsteine,
Birgit Günther, 2008 |
Thaumasite |
1.464 |
1.507 |
0.036 |
0.036 |
1.9 |
1.91 |
1.464 |
1.468 |
1.500 |
1.507 |
Tables of Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 |
Thaumasite |
1.464 |
1.507 |
0.036 |
0.036 |
1.91 |
1.91 |
|
|
|
|
Gemology Tools Professional 2010 |
Thaumasite |
1.467 |
1.505 |
0.038 |
0.038 |
1.9 |
1.9 |
1.467 |
1.467 |
1.505 |
1.505 |
Gemmological Tables, Ulrich Henn,
2004 |
CAUSE OF
COLOUR
MINERAL
INCLUSIONS
LOCALITIES
STONE |
LOCALITIES |
REFERENCE |
|||
Thaumasite |
Black Rock Mine |
Kuruman, Kalahari |
Northern Cape Province |
South Africa |
Gems & Gemology 1991 Summer p 131 |
CHEMICAL DATA
(%)