|
INVESTIGATIONS
|
Stone |
RI min |
RI max |
Dens min |
Dens max |
Colour |
Location |
Info |
Spectrum |
UVS |
UVL |
Reference |
|
Lapis
Lazuli |
1.5 |
1.5 |
2.71 |
2.83 |
light blue to dark blue;
slightly different tones of blue within a single
piece |
Chili |
|
|
lazurite:inert; strong
blue-white |
lazurite inert; strong
orange-red |
Gems & Gemology 2000 Spring
2000 |
|
Lapis
Lazuli |
1.51 |
1.51 |
2.85 |
2.85 |
|
Afghanistan |
cabochon 4ct, banded structure,
spot RI |
|
|
|
Gems & Gemology 1990 Summer,
p155 |
TABLES
|
Stone |
RI min |
RI max |
Dens min |
Dens max |
Reference |
|
Lapis
Lazuli |
1.45 |
1.55 |
2.38 |
3 |
http://www.geminterest.com
|
|
Synthetic
Lapis-Lazuli |
1.45 |
1.55 |
2.4 |
3 |
http://www.geminterest.com
|
|
Lapis
lazuli |
1.495 |
1.505 |
2.38 |
2.9 |
http://www.gemmology.be
|
|
Lapis
Lazuli |
1.5 |
1.5 |
2.5 |
3 |
John Sinkakas, Gemstone and
mineral data book,1972
|
|
Lapis
Lazuli |
1.5 |
1.5 |
2.5 |
3 |
Bestimmungstabellen für Edelsteine, Birgit
Günther, 1981
|
|
Lapis
Lazuli |
1.5 |
1.5 |
2.4 |
2.95 |
Gemme, Dati per l'identificazione, P. De Stefano
et al, 1993
|
|
Lapis
Lazuli |
1.5 |
1.5 |
2.5 |
3 |
Gemmological Tables, Ulrich Henn, 2004
|
|
Lapis
Lazuli |
1.5 |
1.5 |
2.5 |
3 |
Tabellen zur Edelstein-Bestimmung, Pschichholz
FGA, 1975
|
|
Lapis
Lazuli |
1.5 |
1.5 |
2.7 |
2.9 |
Joel Arem, Color Encyclopedia
of Gemstones, 1987
|
|
Lapis
Lazuli |
1.5 |
1.5 |
2.7 |
2.9 |
Gems, R Webster, 5th edition
1994
|
|
Lapis
Lazuli |
1.5 |
1.5 |
2.5 |
3 |
Tables of Gemstone
Identification, Roger Dedeyne, Ivo Quintens, 2007
|
|
Synthetic
Lapis-Lazuli |
1.5 |
1.55 |
2.46 |
2.46 |
Joel Arem, Color Encyclopedia
of Gemstones, 1987
|
|
Synthetic
Lapis-Lazuli |
1.5 |
1.5 |
2.38 |
2.38 |
Bestimmungstabellen für Edelsteine, Birgit
Günther, 1981
|
|
Synthetic
Lapis-Lazuli |
1.5 |
1.5 |
2.38 |
2.46 |
Gemme, Dati per l'identificazione, P. De Stefano
et al, 1993
|
|
Synthetic
Lapis-Lazuli |
1.5 |
1.5 |
2.38 |
2.38 |
Gemmological Tables, Ulrich Henn, 2004
|
|
Synthetic
Lapis-Lazuli |
1.5 |
1.55 |
2.4 |
3 |
http://www.gemmology.be
|
|
Synthetic
Lapis-Lazuli |
1.5 |
1.5 |
2.38 |
2.38 |
Tabellen zur Edelstein-Bestimmung, Pschichholz
FGA, 1975
|
|
Synthetic
Lapis-Lazuli |
1.5 |
1.55 |
2.3 |
2.4 |
Tables of Gemstone
Identification, Roger Dedeyne, Ivo Quintens, 2007
|
|
Lapis
Lazuli |
1.5 |
1.5 |
2.5 |
3 |
Gemology Tools Professional 2010
|
|
Lapis
Lazuli |
1.5 |
1.54 |
2.45 |
2.8 |
Gemmo.eu 2013
|
CAUSE OF COLOUR
|
Stone |
Colour |
Cause of
colour |
Reference |
|
Lapis
Lazuli |
blue |
colour
centre |
Steffen, Farbe und Lumineszenz von Mineralien,
2000 |
|
Lapis
Lazuli |
blue |
S3- (charge
transfer) |
Gems & Gemology Summer
1988 |
MINERAL INCLUSIONS
|
Inclusion |
Stone |
Reference |
|
pyrite |
Lapis
Lazuli |
Gems & Gemology 2000 Spring
2000 |
LOCALITIES
|
STONE |
LOCALITIES |
REFERENCE | |||
|
lapis
lazuli |
Ladjuar Medam (Lajur Madan; Lapis-lazuli Mine;
Lapis-lazuli deposit), Sar-e Sang |
Sar-e-Sang |
Badakhshan Province
|
Afghanistan |
Gems & Gemology 1981 Winter,
p184-190 |
|
lapis
lazuli |
Baffin
Island |
Harbour
Lake |
|
Canada |
Lapis
2000/12 |
|
lapis
lazuli |
Lapis Lazuli
Cerro |
Ovalle |
Coquimbo |
Chili |
Lapis
2000/12 |
|
lapis
lazuli |
Thabanpin |
Mogok |
Mandalay |
Myanmar |
Lapis
2000/11 |
|
lapis
lazuli |
Lyadzhvardara (Lyajvardara;
Luadzhvardara) deposit, Badom-Dara, Shakhdara range, Khorog
Region |
Pamir Mts |
Viloyati Mukhtori
Gorno-Badakhshan |
Tajikistan |
Lapis
2000/12 |
|
lapis
lazuli |
North Italian Mt, Italian
Mt |
Gunnison
County |
Colorado |
USA |
Lapis
2000/12 |
|
lapis
lazuli |
Cascade Canyon, San Gabriel
Mts |
San Bernadino
County |
California |
USA |
Lapis
2000/12 |
CHEMICAL DATA
(%)