|
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 |
Lazulite |
1.606 |
1.648 |
0.032 |
0.034 |
2.99 |
3.22 |
|
Minas Gerais, Bahia and Rio
Grande do Norte (Brazil) |
|
1.606 |
1.614 |
|
|
1.639 |
1.648 |
|
|
|
The Australian Gemmologist 2003 Vol 21, N°10,
p390-399 |
Lazulite |
1.608 |
1.642 |
0.032 |
0.032 |
3.09 |
3.1 |
blue |
Afghanistan |
|
1.608 |
1.610 |
1.630 |
1.632 |
1.640 |
1.642 |
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2003 Mar,
p47-48 |
Lazulite |
1.61 |
1.64 |
0.03 |
0.03 |
3.12 |
3.12 |
blue,
transparent |
Brazil |
0.12ct |
|
|
|
|
|
|
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2008 Dec,
p118 |
Lazulite |
1.61 |
1.64 |
0.03 |
0.03 |
3.12 |
3.12 |
green |
Gilgit,
Pakistan |
|
|
|
|
|
|
|
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2001 Jun,
p65-74 |
Lazulite |
1.616 |
1.645 |
0.027 |
0.027 |
|
|
blue |
|
0.48ct |
1.616 |
1.616 |
1.633 |
1.633 |
1.645 |
1.645 |
|
|
|
Gems & Gemology 1975 Spring,
p16 |
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 |
Lazulite |
1.604 |
1.663 |
0.031 |
0.037 |
3 |
3.22 |
1.604 |
1.626 |
1.630 |
1.654 |
1.641 |
1.663 |
http://www.geminterest.com
|
Lazulite |
1.604 |
1.662 |
0.031 |
0.036 |
2.96 |
3.08 |
1.604 |
1.625 |
|
|
1.639 |
1.662 |
Gemme, Dati per l'identificazione, P. De Stefano
et al, 1993
|
Lazulite |
1.604 |
1.644 |
0.032 |
0.034 |
3.05 |
3.17 |
1.604 |
1.610 |
1.628 |
1.633 |
1.638 |
1.644 |
Gemmological Tables, Ulrich Henn, 2004
|
Lazulite |
1.604 |
1.662 |
0.031 |
0.037 |
3.08 |
3.22 |
|
|
|
|
|
|
http://www.gemmology.be
|
Lazulite |
1.604 |
1.662 |
0.031 |
0.036 |
3.08 |
3.08 |
1.604 |
1.625 |
1.633 |
1.653 |
1.642 |
1.662 |
Joel Arem, Color Encyclopedia
of Gemstones, 1987
|
Lazulite |
1.604 |
1.663 |
0.031 |
0.04 |
3.07 |
3.24 |
1.604 |
1.626 |
1.626 |
1.654 |
1.637 |
1.663 |
Tables of Gemstone
Identification, Roger Dedeyn, Ivo Quintens, 2007
|
Lazulite |
1.61 |
1.64 |
0.03 |
0.03 |
3.04 |
3.13 |
|
|
|
|
|
|
Tabellen zur Edelstein-Bestimmung, Pschichholz
FGA, 1975
|
Lazulite |
1.612 |
1.646 |
0.031 |
0.035 |
3.04 |
3.14 |
1.604 |
1.620 |
|
|
1.638 |
1.655 |
Bestimmungstabellen für Edelsteine, Birgit
Günther, 2008
|
Lazulite |
1.615 |
1.645 |
0.036 |
0.036 |
3.09 |
3.1 |
|
|
|
|
|
|
John Sinkakas, Gemstone and
mineral data book,1972
|
Lazulite |
1.615 |
1.645 |
0.036 |
0.036 |
3.1 |
3.1 |
|
|
|
|
|
|
Gems, R Webster, 5th edition
1994
|
CAUSE OF COLOUR
Stone |
Colour |
Cause of
colour |
Reference |
Lazulite |
blue |
Fe²+-O-Fe³+ charge
transfer |
Gems & Gemology Summer
1988 |
Lazulite |
green |
Fe²+-O-Fe³+ charge transfer
(much less then blue lazulite) and Fe²+-Ti4
IVCT |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2001 Jun
p70-73 |
MINERAL INCLUSIONS
Inclusion |
Stone |
Reference |
albite |
Lazulite |
The Australian Gemmologist 2003 Vol 21,N° 10,
p397 |
augelite |
Lazulite |
The Australian Gemmologist 2003 Vol 21,N° 10,
p397 |
brazilianite |
Lazulite |
The Australian Gemmologist 2003 Vol 21,N° 10,
p397 |
kyanite |
Lazulite |
The Australian Gemmologist 2003 Vol 21,N° 10,
p397 |
muscovite |
Lazulite |
The Australian Gemmologist 2003 Vol 21,N° 10,
p397 |
quartz |
Lazulite |
The Australian Gemmologist 2003 Vol 21,N° 10,
p397 |
sericite |
Lazulite |
The Australian Gemmologist 2003 Vol 21,N° 10,
p397 |
LOCALITIES
CHEMICAL DATA (%)
Stone |
Colour |
Locality |
Reference |
SiO2 |
Al2O3 |
MnO |
MgO |
FeO |
TiO2 |
CaO |
Ga2O3 |
ZnO |
K2O |
H2O |
SrO |
P2O5 |
BaO |
SO3 | |
Lazulite |
|
Alto dos Preas, Rio Grande do
Norte |
Brazil |
The Australian Gemmologist 2003, Vol 21, N°10,
p396 |
|
28.05 |
0.11 |
8.4 |
3.02 |
|
7.21 |
|
|
|
6.14 |
|
46 |
|
|
Lazulite |
|
Algodao (or Azul), Rio Grande
do Norte |
Brazil |
The Australian Gemmologist 2003, Vol 21, N°10,
p396 |
13.46 |
35.23 |
0.09 |
8.19 |
1.36 |
0.26 |
2.02 |
|
0.47 |
0.49 |
|
|
31.97 |
0.08 |
|
Lazulite |
|
Algodao (or Azul), Rio Grande
do Norte |
Brazil |
The Australian Gemmologist 2003, Vol 21, N°10,
p396 |
5.78 |
35.21 |
0.06 |
8.63 |
1.53 |
|
1.03 |
|
0.53 |
0.3 |
|
|
41.03 |
|
|
Lazulite |
|
Alto dos Preas, Rio Grande do
Norte |
Brazil |
The Australian Gemmologist 2003, Vol 21, N°10,
p396 |
|
31.3 |
|
9.53 |
4.42 |
0.06 |
1.92 |
|
|
|
5.9 |
|
46.38 |
|
|
Lazulite |
|
Algodao (or Azul), Rio Grande
do Norte |
Brazil |
The Australian Gemmologist 2003, Vol 21, N°10,
p396 |
12.37 |
37.32 |
|
10.35 |
0.24 |
|
1.02 |
|
0.02 |
0.21 |
|
|
32.01 |
0.25 |
|
Lazulite |
|
Alto dos Preas, Rio Grande do
Norte |
Brazil |
The Australian Gemmologist 2003, Vol 21, N°10,
p396 |
|
25.7 |
0.1 |
8.4 |
3.3 |
|
9.43 |
|
|
|
6 |
|
45.81 |
|
|
Lazulite |
|
Algodao (or Azul), Rio Grande
do Norte |
Brazil |
The Australian Gemmologist 2003, Vol 21, N°10,
p396 |
7.67 |
35.45 |
|
9.58 |
1.02 |
0.03 |
2.49 |
|
0.05 |
0.3 |
|
|
36.87 |
0.24 |
|
Lazulite |
|
Formaçao Farm, Diamantina,
Minas Gerais |
Brazil |
The Australian Gemmologist 2003, Vol 21, N°10,
p396 |
0.57 |
30.95 |
0.06 |
8.77 |
4.88 |
0.08 |
0.46 |
|
|
0.04 |
|
|
47.94 |
|
|
Lazulite |
|
Morro de Chapéu, Botamirium, Minas
Gerais |
Brazil |
The Australian Gemmologist 2003, Vol 21, N°10,
p396 |
0.35 |
28.63 |
0.04 |
7.82 |
4.32 |
0.07 |
0.04 |
|
|
0.04 |
|
|
52.39 |
|
|
Lazulite |
|
Alto dos Preas, Rio Grande do
Norte |
Brazil |
The Australian Gemmologist 2003, Vol 21, N°10,
p396 |
|
27.6 |
0.17 |
8.41 |
4.1 |
|
7.1 |
|
|
|
5.72 |
|
46.1 |
|
|
Lazulite |
|
Rapadura Farm, Diamantina,
Minas Gerais |
Brazil |
The Australian Gemmologist 2003, Vol 21, N°10,
p396 |
|
33.73 |
|
11.62 |
2.62 |
|
|
|
|
|
|
0.05 |
48.72 |
|
0.03 |
Lazulite |
|
Rapadura Farm, Diamantina,
Minas Gerais |
Brazil |
The Australian Gemmologist 2003, Vol 21, N°10,
p396 |
|
32.68 |
|
12.89 |
1.22 |
|
|
|
|
|
|
0.05 |
49.93 |
|
0.01 |
Lazulite |
|
Dumba Hill, Minas
Gerais |
Brazil |
The Australian Gemmologist 2003, Vol 21, N°10,
p396 |
|
31.7 |
|
14.6 |
3.2 |
|
|
|
|
|
5.7 |
|
44.9 |
|
|
Lazulite |
|
Datas, Minas
Gerais |
Brazil |
The Australian Gemmologist 2003, Vol 21, N°10,
p396 |
|
32.55 |
|
11.97 |
3.29 |
0.16 |
|
7360 |
|
|
5.1 |
|
46.12 |
|
|
Lazulite |
|
Tejucana Mining, Jequitinhonha
river, Minas Gerais |
Brazil |
The Australian Gemmologist 2003, Vol 21, N°10,
p396 |
|
29.9 |
|
14.1 |
3.3 |
|
|
|
|
|
5.4 |
|
47.2 |
|
|
Lazulite |
|
Alto dos Preas, Rio Grande do
Norte |
Brazil |
The Australian Gemmologist 2003, Vol 21, N°10,
p396 |
|
31.9 |
0.17 |
8.9 |
3.17 |
0.01 |
6.87 |
|
|
|
5.85 |
|
41.06 |
|
|
Lazulite |
|
Corrego da Prata, Minas
Gerais |
Brazil |
The Australian Gemmologist 2003, Vol 21, N°10,
p396 |
|
27.7 |
|
16.5 |
4.1 |
|
|
|
|
|
6.7 |
|
43.9 |
|
|