|
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 |
|
Barite |
1.63 |
1.64 |
0.01 |
0.01 |
4.6 |
4.6 |
colourless |
Lake Magadi, Rift Valley, Kenya |
13.59ct |
|
|
|
|
|
|
|
inert |
inert |
GIA Gem Database 34335 |
|
Barite |
1.63 |
1.642 |
0.012 |
0.012 |
4.53 |
4.53 |
yellowish |
Madagascar |
0.44ct |
|
|
|
|
|
|
|
inert |
red-brown |
ACAM lab
930 |
|
Barite |
1.63 |
1.64 |
0.01 |
0.01 |
4.5 |
4.5 |
brownish orangy yellow |
France |
7.25ct |
|
|
|
|
|
|
no features |
weak whitish yellow |
moderate whitish yellow |
GIA Gem Database 35345 |
|
Barite |
1.632 |
1.648 |
0.016 |
0.016 |
4.68 |
4.68 |
yellowish |
Madagascar |
0.47ct |
|
|
|
|
|
|
|
inert |
bluish |
ACAM lab
929 |
|
Barite |
1.634 |
1.649 |
0.015 |
0.015 |
4.52 |
4.52 |
greenish blue |
Sterling Mine, Stoneham, Colorado, USA |
7.55ct |
|
|
|
|
|
|
no features |
inert |
inert |
GIA Gem Database 35167 |
|
Barite |
1.634 |
1.647 |
0.013 |
0.013 |
4.49 |
4.49 |
very pale brownish yellow, medium brownish yellow and a cognac-like
orangey brown |
South Dakota, USA |
3 stones 2.27ct to 7.90 ct |
|
|
|
|
|
|
|
very faint yellowish white |
moderate-to-strong yellowish white |
The Journal of Gemmology 2017 Vol 35-8, p691 |
|
Barite |
1.637 |
1.65 |
0.013 |
0.013 |
4.49 |
4.49 |
|
Alenquer, Para, Brazil |
|
|
|
|
|
|
|
|
inert |
inert |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2010 59/3-4, p103-105 |
|
Barite |
1.637 |
1.65 |
0.013 |
0.013 |
4.61 |
4.61 |
brownish yellow |
Tsumeb, Namibia |
11.91ct |
|
|
|
|
|
|
no features |
inert |
inert |
GIA Gem Database 34691 |
|
Barite |
1.64 |
1.65 |
0.01 |
0.01 |
4.64 |
4.64 |
orangy yellow |
Cumbria, UK |
6.99ct |
|
|
|
|
|
|
|
inert |
inert |
GIA Gem Database 35344 |
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 |
|
Barite |
1.632 |
1.65 |
0.01 |
0.018 |
4.3 |
4.6 |
1.632 |
1.636 |
1.634 |
1.638 |
1.647 |
1.650 |
http://www.geminterest.com |
|
Barite |
1.634 |
1.649 |
0.012 |
0.012 |
4.3 |
4.6 |
|
|
|
|
|
|
Gemology Tools Professional 2010 |
|
Barite |
1.635 |
1.65 |
0.01 |
0.013 |
4.3 |
4.6 |
|
|
|
|
|
|
Gemmo.eu
|
|
Barite |
1.636 |
1.648 |
0.012 |
0.012 |
4.3 |
4.6 |
|
|
|
|
|
|
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
|
Barite |
1.636 |
1.648 |
0.012 |
0.012 |
4.3 |
4.6 |
1.636 |
1.636 |
|
|
1.648 |
1.648 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
|
Barite |
1.636 |
1.648 |
0.012 |
0.012 |
4.48 |
4.51 |
1.636 |
1.636 |
1.637 |
1.637 |
1.648 |
1.648 |
Gemmological Tables, Ulrich Henn,
2004 |
|
Barite |
1.636 |
1.648 |
0.012 |
0.012 |
4.3 |
4.6 |
|
|
|
|
|
|
http://www.gemmology.be |
|
Barite |
1.636 |
1.648 |
0.012 |
0.012 |
4.3 |
4.6 |
|
|
|
|
|
|
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
|
Barite |
1.636 |
1.648 |
0.012 |
0.012 |
4.3 |
4.6 |
1.636 |
1.636 |
1.637 |
1.637 |
1.648 |
1.648 |
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
|
Barite |
1.636 |
1.648 |
0.012 |
0.012 |
4.47 |
4.5 |
|
|
|
|
|
|
John Sinkakas, Gemstone and mineral data
book,1972 |
|
Barite |
1.636 |
1.648 |
0.012 |
0.012 |
4.3 |
4.6 |
1.636 |
1.636 |
1.637 |
1.637 |
1.648 |
1.648 |
Gems, R Webster, 5th edition 1994 |
|
Barite |
1.636 |
1.648 |
0.012 |
0.012 |
4.3 |
4.6 |
|
|
|
|
|
|
Tables of Gemstone Identification, Roger Dedeyne,
Ivo Quintens, 2007 |
CAUSE OF
COLOUR
|
Stone |
Colour |
Cause
of colour |
Reference |
|
Barite |
blue |
O- radiation-damage centers |
http://minerals.caltech.edu |
|
Barite |
honey-yellow, blue |
SOł-
radiation-damage centers |
http://minerals.caltech.edu |
|
Barite |
yellow |
SO˛-
radiation-damage centers |
http://minerals.caltech.edu |
MINERAL
INCLUSIONS
|
Inclusion |
Stone |
Reference |
|
auripigment |
Barite |
Gems & Gemology Spring 2019, p117 |
|
cinnaber |
Barite |
The Journal of Gemmology 1994, 24,1, p46 |
|
stibiconiet |
Barite |
www.mindat.org |
LOCALITIES
|
STONE |
LOCALITIES |
REFERENCE |
|||
|
Barite |
|
Alenquer |
Para |
Brazil |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2010, 59/3-4, p103-105 |
|
Barite |
Rock Candy mine |
Grand Forks |
British Columbia |
Canada |
Joel Arem, Color Encyclopedia of Gemstones, 1987 |
|
Barite |
|
Thunder Bay District |
Ontario |
Canada |
Joel Arem, Color Encyclopedia of Gemstones, 1987 |
|
Barite |
|
|
Cumbria |
England |
Joel Arem, Color Encyclopedia of Gemstones, 1987 |
|
Barite |
|
Meade County |
South Dakota |
USA |
Joel Arem, Color Encyclopedia of Gemstones, 1987 |