|
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 |
|
Purpurite |
|
|
|
|
3,35 |
3,35 |
purple |
|
heterosite-purpurite |
|
|
|
|
|
|
|
|
|
http://gtljaipur.info
2021 vol78, May |
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 |
|
Purpurite |
1.85 |
1.92 |
0.07 |
0.07 |
3.37 |
3.37 |
1.850 |
1.850 |
1.860 |
1.860 |
1.920 |
1.920 |
Gemmological Tables, Ulrich Henn,
2004 |
|
Purpurite |
1.85 |
1.92 |
0.07 |
0.07 |
3.69 |
3.69 |
|
|
|
|
|
|
http://www.gemmology.be |
|
Purpurite |
1.85 |
1.92 |
0.07 |
0.07 |
3.69 |
3.69 |
1.850 |
1.850 |
1.860 |
1.860 |
1.920 |
1.920 |
Joel Arem, Color
Encyclopedia of Gemstones, 1987 |
|
Purpurite |
1.85 |
1.92 |
0.07 |
0.07 |
3.2 |
3.7 |
1.850 |
1.850 |
1.860 |
1.860 |
1.920 |
1.920 |
http://www.geminterest.com |
|
Purpurite |
1.85 |
1.92 |
0.07 |
0.07 |
3.37 |
3.4 |
|
|
|
|
|
|
Bestimmungstabellen für Edelsteine,
Birgit Günther, 2008 |
|
Purpurite |
1.85 |
1.92 |
0.07 |
0.07 |
3.6 |
3.69 |
|
|
|
|
|
|
Tables of
Gemstone Identification, Roger Dedeyn, Ivo Quintens, 2007 |
CAUSE OF
COLOUR
|
Stone |
Colour |
Cause
of colour |
Reference |
|
Purpurite |
red |
Mn³+
in octahedral coordination |
Alain Abréal, juillet 2002 |
MINERAL
INCLUSIONS
LOCALITIES
CHEMICAL DATA
(%)