|
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 |
|
Quartzite |
1,54 |
1,549 |
0,009 |
0,009 |
2,66 |
2,66 |
dyed green |
|
jadeite simulant |
|
|
|
|
band from approximately
662 nm to 688 nm |
inert |
inert |
Gems & Gemology 1990
Spring, p101 |
|
Quartzite |
1,54 |
1,54 |
|
|
2,64 |
2,64 |
green to blue-green |
Badaskhshan, Afghanistan |
copper-stained
(malachite?), faceted (up to 18.77ct)
and cabochons, translucent, sold as "Tushkan jade", spot RI |
|
|
|
|
|
|
|
The Journal of Gemmology
2017 Vol35, N°6, p475-476 |
|
aventurine quartz |
1,54 |
1,54 |
|
|
2,66 |
2,66 |
colourless+green
"floating flower" inclusions |
|
bangle, jadeite
imitation, fuchsite inclusions (red under chelsea filter) |
|
|
|
|
|
|
|
Gems & Gemology 2021
winter, p408 |
|
Quartzite |
1,54 |
1,54 |
|
|
2,67 |
2,67 |
white with green fuchsite
inclusions |
|
bangle, jade imitation |
|
|
|
|
|
|
|
Gems & Gemology 2022
winter, p512 |
|
Quartzite |
1,543 |
1,552 |
0,009 |
0,009 |
2,65 |
2,65 |
red aventurescent |
Tanzania |
called 'cherry
tanzurine'or natural cherry quartz, beads, mica (muscovite) inclusions |
|
|
|
|
|
|
|
The Journal of Gemmology
2018 36(3) p196-197 |
|
Quartzite |
1,543 |
1,552 |
0,009 |
0,009 |
2,65 |
2,65 |
green aventurescent |
Tanzania |
sold as "emerald
quartz", fuchsite inclusions |
|
|
|
|
|
|
|
The Journal of Gemmology
2018 36(2), p 103 |
|
Quartzite |
1,55 |
1,55 |
|
|
2,64 |
2,64 |
purple (dyed) |
|
|
|
|
|
|
broad band from 540-580nm |
|
|
Gems & Gemology 1998
summer, p 131-132 |
TABLES
|
Stone |
RI min |
RI max |
Biref min |
Biref max |
Dens min |
Dens max |
ne min |
ne max |
no min |
no max |
Reference |
|
Quartzite |
1.544 |
1.553 |
0.009 |
0.009 |
2.58 |
2.69 |
|
|
|
|
Tables of Gemstone
Identification, Roger Dedeyne, Ivo Quintens, 2007 |
|
Quartzite |
1.544 |
1.553 |
0.009 |
0.009 |
2.641 |
2.691 |
|
|
|
|
Gemology Tools Professional 2010 |
|
aventurine quartz |
1.544 |
1.553 |
0.009 |
0.009 |
2.64 |
2.69 |
|
|
|
|
Gemology Tools Professional 2010 |
|
aventurine quartz |
1.539 |
1.557 |
0.009 |
0.01 |
2.64 |
2.69 |
1.549 |
1.557 |
1.539 |
1.550 |
http://www.geminterest.com |
|
aventurine quartz |
1.53 |
1.554 |
0.001 |
0.01 |
2.62 |
2.7 |
|
|
|
|
Gemmo.eu 2018 |
|
Quartzite |
|
|
|
|
2.64 |
2.69 |
|
|
|
|
Joel Arem, Color
Encyclopedia of Gemstones, 1987 |
CAUSE OF
COLOUR
|
Stone |
Colour |
Cause of
colour |
Reference |
|
aventurine quartz |
green |
fuchsite inclusions |
Gems & Gemology Summer 1988 |
MINERAL
INCLUSIONS
|
Inclusion |
Stone |
Reference |
|
fuchsite |
aventurine quartz |
Gemmological Tables, Ulrich
Henn , GGA, 2004 |
|
pyrite |
aventurine quartz |
www.geminterest.com |
LOCALITIES
CHEMICAL DATA
(%)