|
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 |
Augite |
1,681 |
1,703 |
|
|
3,35 |
3,35 |
dark brown |
Vietnam |
cabochon 50,56ct,
six-rayed star, curved silk-like inclusions (magnetite?) |
|
|
|
|
|
|
|
inert |
inert |
The Journal of Gemmology
2022 38(1), p8 |
Augite |
1,682 |
1,702 |
0,02 |
0,02 |
3,2 |
3,2 |
dark green |
|
8ct |
|
|
|
|
|
|
faint line at 500nm |
inert |
inert |
Gems & Gemology 1989
spring p35 |
Augite |
1,702 |
1,728 |
0,026 |
0,026 |
3,35 |
3,35 |
black |
|
1.5ct |
|
|
|
|
|
|
|
|
|
Gems & Gemology 1988
Fall, p170 |
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 |
Augite |
1.67 |
1.772 |
0.024 |
0.028 |
3.2 |
3.55 |
|
|
|
|
|
|
Gemmo.eu 2013 |
Augite |
1.671 |
1.774 |
0.026 |
0.039 |
3.19 |
3.56 |
1.671 |
1.735 |
1.672 |
1.741 |
1.703 |
1.774 |
Tables of
Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 |
CAUSE OF
COLOUR
MINERAL
INCLUSIONS
LOCALITIES
CHEMICAL DATA
Stone |
Colour |
Locality |
Reference |
SiO2 |
Al2O3 |
MnO |
MgO |
FeO |
TiO2 |
CaO |
Na2O |
Cr2O3 |
Fe2O3 |
|
Augite |
black |
Bo Phloi |
Thailand |
The Australian Gemmologist 2009,Vol 23,
N°6 p244 |
47.19 |
9.42 |
0.195 |
11.55 |
4.11 |
2.04 |
20.37 |
1.57 |
|
3.39 |
Augite |
black |
Bo Phloi |
Thailand |
The Australian Gemmologist 2009,Vol 23,
N°6 p244 |
50.99 |
7.41 |
|
15.52 |
2.54 |
0.8 |
18.81 |
1.6 |
0.461 |
2.86 |
Augite |
black |
Bo Phloi |
Thailand |
The Australian Gemmologist 2009,Vol 23,
N°6 p244 |
47.52 |
9.72 |
11.81 |
3.05 |
1.95 |
20.55 |
1.76 |
|
4.2 |
|
Augite |
black |
Den Chai |
Thailand |
The Australian Gemmologist 2009,Vol 23,
N°6 p244 |
48.41 |
9.23 |
0.24 |
14.23 |
4.35 |
1.08 |
17.88 |
1.29 |
|
2.08 |
Augite |
black |
Den Chai |
Thailand |
The Australian Gemmologist 2009,Vol 23,
N°6 p244 |
48.14 |
9.21 |
|
12.93 |
5.75 |
1.63 |
18.67 |
1.36 |
|
1.23 |
Augite |
black |
Den Chai |
Thailand |
The Australian Gemmologist 2009,Vol 23,
N°6 p244 |
48.55 |
9.17 |
0.23 |
13.98 |
3.08 |
1.28 |
18.23 |
1.64 |
|
3.75 |