|
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 |
Petalite |
1.504 |
1.517 |
0.013 |
0.013 |
2.394 |
2.394 |
colourless |
Brazil |
2 stones of 26ct |
1.50 |
1.50 |
1.51 |
1.51 |
1.52 |
1.52 |
|
|
|
The Journal of Gemmology 1972 N°3,p95 |
Petalite |
1.505 |
1.516 |
0.011 |
0.011 |
2.39 |
2.39 |
|
|
|
|
|
|
|
|
|
no 454nm |
|
weak orange |
Australian Gemmologist 2003 10, p409 |
Petalite |
1.505 |
1.515 |
0.01 |
0.01 |
2.4 |
2.4 |
colourless |
Laghman, Afghanistan |
|
|
|
|
|
|
|
no lines or bands |
inert |
inert |
Gems & Gemology 2009 Summer,
p150-151 |
Petalite |
1.505 |
1.519 |
0.014 |
0.014 |
2.41 |
2.41 |
colourless |
Itinga, Minas Gerais, Brazil |
5.2ct |
1.505 |
1.505 |
1.511 |
1.511 |
1.519 |
1.519 |
|
inert |
inert |
ACAM Lab
4497 |
Petalite |
1.505 |
1.515 |
0.01 |
0.01 |
2.42 |
2.42 |
colourless |
|
0.79ct |
1.505 |
1.505 |
1.508 |
1.508 |
1.515 |
1.515 |
|
inert |
inert |
ACAM Lab
1151 |
Petalite |
1.506 |
1.52 |
0.012 |
0.014 |
2.403 |
2.419 |
white, colourless, pinkish brown |
Momeik (Molo) , Mogok, Birma |
|
1.506 |
1.508 |
1.510 |
1.515 |
1.520 |
1.520 |
|
inert and weak yellow |
inert and weak yellow |
The Australian Gemmologist 2005 22,
p303-309 |
Petalite |
1.507 |
1.52 |
0.013 |
0.013 |
2.41 |
2.41 |
colourless |
Itinga, Minas Gerais, Brazil |
16.48ct |
|
|
|
|
|
|
|
inert |
inert |
GIA Gem Database 35291 |
Petalite |
1.509 |
1.52 |
0.011 |
0.011 |
2.41 |
2.41 |
colourless |
Minas Gerais, Brazil |
11.14ct |
|
|
|
|
|
|
|
inert |
inert |
GIA Gem Database 35474 |
Petalite |
1.51 |
1.52 |
0.01 |
0.01 |
2.41 |
2.41 |
colourless1.51 |
Brazil |
41.12ct |
|
|
|
|
|
|
no features |
inert |
inert |
GIA Gem Database 35463 |
Petalite |
|
|
|
|
2.39 |
2.39 |
orangy red |
|
17.60ct, opaque, cabochon, cat's eye |
|
|
|
|
|
|
broad absorption below 420nm |
inert |
weak yellow |
GIA Gem Database 35461 |
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 |
Petalite |
1.5 |
1.524 |
0.01 |
0.015 |
2.3 |
2.5 |
|
|
|
|
|
|
Gemmo.eu
|
Petalite |
1.501 |
1.519 |
0.012 |
0.014 |
2.39 |
2.46 |
1.501 |
1.507 |
|
|
1.513 |
1.519 |
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
Petalite |
1.502 |
1.519 |
0.012 |
0.017 |
2.38 |
2.4 |
1.502 |
1.505 |
1.509 |
1.509 |
1.515 |
1.519 |
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
Petalite |
1.502 |
1.523 |
0.012 |
0.017 |
2.34 |
2.49 |
1.502 |
1.510 |
|
|
1.515 |
1.523 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
Petalite |
1.502 |
1.518 |
0.012 |
0.016 |
2.39 |
2.4 |
1.502 |
1.505 |
1.509 |
1.512 |
1.515 |
1.518 |
Gemmological Tables, Ulrich Henn,
2004 |
Petalite |
1.502 |
1.523 |
0.012 |
0.016 |
2.3 |
2.6 |
1.502 |
1.510 |
1.508 |
1.521 |
1.516 |
1.523 |
http://www.geminterest.com |
Petalite |
1.502 |
1.522 |
0.012 |
0.016 |
2.39 |
2.46 |
|
|
|
|
|
|
Gemology Tools Professional 2010 |
Petalite |
1.503 |
1.523 |
0.012 |
0.014 |
2.3 |
2.5 |
|
|
|
|
|
|
http://www.gemmology.be |
Petalite |
1.503 |
1.523 |
0.012 |
0.014 |
2.3 |
2.5 |
1.503 |
1.510 |
1.510 |
1.521 |
1.516 |
1.523 |
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
Petalite |
1.503 |
1.523 |
0.012 |
0.014 |
2.3 |
2.5 |
1.503 |
1.510 |
1.510 |
1.521 |
1.516 |
1.523 |
Tables of Gemstone Identification, Roger Dedeyne,
Ivo Quintens, 2007 |
Petalite |
1.504 |
1.516 |
0.012 |
0.012 |
2.39 |
2.46 |
|
|
|
|
|
|
John Sinkakas, Gemstone and mineral data
book,1972 |
Petalite |
1.504 |
1.52 |
0.012 |
0.014 |
2.39 |
2.46 |
|
|
|
|
|
|
Gems, R Webster, 5th edition 1994 |
CAUSE OF
COLOUR
MINERAL
INCLUSIONS
LOCALITIES
STONE |
LOCALITIES |
REFERENCE |
|||
Petalite |
Momeik |
Mogok |
Mandalay |
Myanmar |
The Australian Gemmologist (2005) 22,
p308 |
CHEMICAL DATA
(%)