|
INVESTIGATIONS
TABLES
|
Stone |
RI min |
RI max |
Dens min |
Dens max |
Reference |
|
Villiaumite |
1.326 |
1.332 |
2.78 |
2.81 |
Tables of Gemstone Identification, Roger Dedeyn,
Ivo Quintens, 2007
|
|
Villiaumite |
1.327 |
1.327 |
2.79 |
2.79 |
Joel Arem, Color Encyclopedia of Gemstones,
1987
|
|
Villiaumite |
1.327 |
1.33 |
2.78 |
2.8 |
Gemme, Dati per l'identificazione, P. De Stefano
et al, 1993
|
|
Villiaumite |
1.327 |
1.327 |
2.79 |
2.79 |
http://www.gemmology.be
|
|
Villiaumite |
1.327 |
1.328 |
2.79 |
2.79 |
http://www.geminterest.com
|
|
Villiaumite |
1.328 |
1.332 |
2.79 |
2.79 |
Bestimmungstabellen für Edelsteine, Birgit
Günther, 2008
|
|
Villiaumite |
1.328 |
1.332 |
2.79 |
2.79 |
Gemmological Tables, Ulrich Henn, 2004
|
|
Villiaumite |
1.328 |
1.332 |
2.79 |
2.79 |
Gems, R Webster, 5th edition 1994
|
CAUSE OF COLOUR
|
Stone |
Colour |
Cause of
colour |
Reference |
|
Villiaumite |
red,
brown |
inclusions of
ironoxide |
Steffen, Farbe und Lumineszenz von Mineralien,
2000 |
|
Villiaumite |
red |
radiation damage from external ionizing
radiation |
http://minerals.gps.caltech.edu |
MINERAL INCLUSIONS
LOCALITIES
|
STONE |
LOCALITIES |
REFERENCE | |||
|
Villiaumite |
Poudrette quarry (Demix quarry; Uni-Mix quarry;
Desourdy quarry) |
Mont Saint-Hilaire, Rouville
County |
Quebec |
Canada |
Zeitschrift der Deutschen Gemmologischen
Gesellschaft, 1994, Dez, p137 |
CHEMICAL DATA (%)