|
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 |
Dioptase |
1.652 |
1.705 |
0.053 |
0.053 |
3.28 |
3.28 |
dark bluish green |
Mozambique |
|
|
|
|
|
broad band around 550nm, strong absorption in the violet-blue region |
inert |
inert |
The Australian Gemmologist 2012 Vol 24, Number 9, p215-219 |
Dioptase |
1.655 |
|
|
|
3.27 |
3.27 |
bluish green |
Tsumeb, Namibia |
4.30ct |
|
|
|
|
broad absorption below 480nm and above 550nm |
inert |
inert |
GIA Gem Database 34699 |
TABLES
Stone |
RI
min |
RI
max |
Biref
min |
Biref
max |
Dens
min |
Dens
max |
ne
min |
ne
max |
no
min |
no
max |
Reference |
Dioptase |
1.644 |
1.709 |
0.053 |
0.053 |
3.3 |
3.3 |
|
|
|
|
John Sinkakas, Gemstone and mineral data
book,1972 |
Dioptase |
1.644 |
1.709 |
0.051 |
0.053 |
3.25 |
3.35 |
1.697 |
1.709 |
1.644 |
1.658 |
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
Dioptase |
1.644 |
1.709 |
0.051 |
0.053 |
3.25 |
3.35 |
1.697 |
1.709 |
1.644 |
1.658 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
Dioptase |
1.644 |
1.709 |
0.051 |
0.053 |
3.28 |
3.35 |
1.697 |
1.709 |
1.644 |
1.658 |
Gemmological Tables, Ulrich Henn,
2004 |
Dioptase |
1.644 |
1.709 |
0.053 |
0.053 |
3.28 |
3.35 |
|
|
|
|
http://www.gemmology.be |
Dioptase |
1.644 |
1.72 |
0.051 |
0.053 |
3.25 |
3.35 |
1.696 |
1.720 |
1.644 |
1.665 |
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
Dioptase |
1.644 |
1.697 |
0.022 |
0.036 |
3.28 |
3.35 |
1.697 |
1.723 |
1.644 |
1.667 |
http://www.geminterest.com |
Dioptase |
1.644 |
1.709 |
0.053 |
0.053 |
3.28 |
3.35 |
1.697 |
1.709 |
1.644 |
1.658 |
Gems, R Webster, 5th edition 1994 |
Dioptase |
1.644 |
1.709 |
0.051 |
0.053 |
3.28 |
3.35 |
1.697 |
1.709 |
1.644 |
1.658 |
Tables of Gemstone Identification, Roger Dedeyne,
Ivo Quintens, 2007 |
Dioptase |
1.664 |
1.709 |
0.053 |
0.053 |
3.28 |
3.35 |
1.697 |
1.709 |
1.664 |
1.658 |
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
CAUSE OF
COLOUR
Stone |
Colour |
Cause
of colour |
Reference |
Dioptase |
green |
Cu²+ in octahedral coordination |
Gems & Gemology Summer 1988 |
MINERAL
INCLUSIONS
LOCALITIES
CHEMICAL DATA