|
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 |
|
Spurrite |
1.64 |
1.68 |
0.04 |
0.04 |
2.85 |
2.96 |
purple |
|
beads, spot RI |
|
|
|
|
|
|
no features |
inert |
inert |
Gems & Gemology 2004 Spring, p63-64 |
|
Spurrite |
1.64 |
1.68 |
|
|
3 |
3 |
medium to dark purple |
Mexico |
shade RI |
|
|
|
|
|
|
|
|
|
Gems & Gemology 1986 Summer, p114 |
|
Spurrite |
1.64 |
1.68 |
0.04 |
0.04 |
3 |
3 |
grey-purple |
|
|
|
|
|
|
|
|
|
|
|
Gems & Gemology 2019 Summer, p 257 |
|
Spurrite |
1.67 |
1.67 |
|
|
3 |
3 |
greyish lilac purple |
Tres Hermanas Mts, Luna County, New Mexico, USA |
IR indistinct, bright line technique, translucent, 3.14 and 5.73ct,
chelsea filter: light pinkish red |
|
|
|
|
|
|
no features |
inert |
inert |
The Journal of Gemmology 2016 Vol 35, No. 1, p 21-22 |
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 |
|
Spurrite |
1.636 |
1.682 |
0.037 |
0.041 |
2.89 |
3.05 |
|
|
|
|
|
|
Gemmo.eu 2013 |
|
Spurrite |
1.637 |
1.681 |
0.039 |
0.04 |
3 |
3.01 |
1.637 |
1.641 |
|
|
1.676 |
1.681 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
|
Spurrite |
1.637 |
1.681 |
0.039 |
0.04 |
3 |
3 |
1.637 |
1.641 |
1.672 |
1.674 |
1.676 |
1.681 |
Gemmological Tables, Ulrich Henn,
2004 |
|
Spurrite |
1.637 |
1.676 |
0.039 |
0.039 |
|
|
1.637 |
1.637 |
1.672 |
1.672 |
1.676 |
1.676 |
Gems, R Webster, 5th edition 1994 |
|
Spurrite |
1.637 |
1.681 |
0.039 |
0.04 |
3.01 |
3.01 |
1.637 |
1.641 |
|
|
1.676 |
1.681 |
Bestimmungstabellen für Edelsteine,
Birgit Günther, 2008 |
|
Spurrite |
1.637 |
1.682 |
0.039 |
0.04 |
3 |
3.02 |
1.637 |
1.641 |
1.672 |
1.674 |
1.676 |
1.682 |
Tables of Gemstone Identification, Roger Dedeyne,
Ivo Quintens, 2007 |
|
Spurrite |
1.64 |
1.679 |
0.039 |
0.039 |
3 |
3 |
|
|
|
|
|
|
http://www.gemmology.be |
|
Spurrite |
1.64 |
1.679 |
0.039 |
0.039 |
3 |
3 |
1.640 |
1.640 |
1.674 |
1.674 |
1.679 |
1.679 |
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
|
Spurrite |
1.64 |
1.679 |
0.039 |
0.039 |
3 |
3 |
1.640 |
1.640 |
1.674 |
1.674 |
1.679 |
1.679 |
http://www.geminterest.com |
|
Spurrite |
1.64 |
1.679 |
0.039 |
0.039 |
3 |
3 |
|
|
|
|
|
|
Gemology Tools Professional 2010 |
CAUSE OF
COLOUR
MINERAL
INCLUSIONS
|
Inclusion |
Stone |
Reference |
|
magnetite |
Spurrite |
Gems & Gemology Summer 2019, p258 |
LOCALITIES
|
STONE |
LOCALITIES |
REFERENCE |
|||
|
Spurrite |
Tres Hermanas district |
Luna County |
New Mexico |
USA |
The Journal of Gemmology 2016, Vol 35, No. 1, p
21-22 |
CHEMICAL DATA
(%)