|
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 |
Zn-Staurolite |
1,721 |
1,731 |
0,01 |
0,01 |
3,79 |
3,79 |
red-brown |
Brazil |
|
|
|
|
|
|
|
|
|
|
Gems & Gemology 1970
fall, p227 |
Staurolite |
1,732 |
1,744 |
0,012 |
0,012 |
3,74 |
3,74 |
dark red, translucent |
Brazil |
0.28ct |
|
|
|
|
|
|
|
|
|
Gemmologie, Zeitschrift
der Deutschen Gemmologischen Gesellschaft 2008 Dec, p121-122 |
Staurolite |
1,734 |
1,748 |
0,014 |
0,014 |
|
|
reddish-brown |
|
transparent |
|
|
|
|
|
|
lines at 526, 550 and
575nm |
|
|
Gems & Gemology 1963
Spring, p19 |
Staurolite |
1,736 |
1,746 |
0,01 |
0,01 |
3,78 |
3,78 |
reddish brown |
|
1,66ct |
1,736 |
1,736 |
1,740 |
1,740 |
1,746 |
1,746 |
|
|
|
The Australian
Gemmologist 2022 Vol28, Nb1, p14 |
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 |
Staurolite |
1.739 |
1.762 |
0.012 |
0.012 |
3.4 |
3.8 |
|
|
|
|
|
|
John Sinkakas,
Gemstone and mineral data book,1972 |
Staurolite |
1.736 |
1.762 |
0.01 |
0.015 |
3.65 |
3.77 |
1.736 |
1.747 |
|
|
1.746 |
1.762 |
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
Staurolite |
1.739 |
1.762 |
0.013 |
0.015 |
3.65 |
3.77 |
1.739 |
1.747 |
1.745 |
1.753 |
1.752 |
1.762 |
Gemmological Tables, Ulrich Henn,
2004 |
Staurolite |
1.736 |
1.762 |
0.01 |
0.015 |
3.65 |
3.83 |
1.736 |
1.747 |
|
|
1.746 |
1.762 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
Staurolite |
1.739 |
1.761 |
0.011 |
0.015 |
3.65 |
3.83 |
|
|
|
|
|
|
http://www.gemmology.be |
Staurolite |
1.739 |
1.762 |
0.011 |
0.015 |
3.62 |
3.78 |
1.739 |
1.747 |
|
|
1.750 |
1.762 |
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
Staurolite |
1.739 |
1.761 |
0.011 |
0.015 |
3.65 |
3.83 |
1.739 |
1.747 |
1.745 |
1.753 |
1.752 |
1.761 |
Joel Arem, Color
Encyclopedia of Gemstones, 1987 |
Staurolite |
1.721 |
1.731 |
0.01 |
0.01 |
3.5 |
3.83 |
1.721 |
1.721 |
|
|
1.731 |
1.731 |
http://www.geminterest.com |
Staurolite |
1.736 |
1.762 |
0.01 |
0.015 |
3.5 |
3.83 |
1.736 |
1.747 |
1.744 |
1.754 |
1.750 |
1.762 |
http://www.geminterest.com |
Staurolite |
1.739 |
1.762 |
0.011 |
0.015 |
3.65 |
3.78 |
1.739 |
1.747 |
1.744 |
1.754 |
1.750 |
1.762 |
Gems, R Webster,
5th edition 1994 |
Staurolite |
1.739 |
1.761 |
0.011 |
0.015 |
3.65 |
3.83 |
1.739 |
1.747 |
1.745 |
1.753 |
1.752 |
1.761 |
Tables of
Gemstone Identification, Roger Dedeyn, Ivo Quintens, 2007 |
CAUSE OF
COLOUR
Stone |
Colour |
Cause
of colour |
Reference |
Staurolite |
blue |
CoČ+ in tetrahedral coordination |
Gems & Gemology Summer 1988 |
Staurolite |
brown |
FeČ+ in tetrahedral coordination |
Gems & Gemology Summer 1988 |
MINERAL
INCLUSIONS
LOCALITIES
CHEMICAL DATA
(%)