|
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 |
Ammolite |
1.512 |
1.672 |
0.15 |
0.15 |
2.79 |
2.81 |
|
|
|
1.512 |
1.528 |
|
|
1.662 |
1.672 |
|
|
|
The Journal of Gemmology 1981
Vol 17, N°6, p406-415 |
Ammolite |
1.52 |
1.68 |
0.154 |
0.155 |
|
|
iridescence in red, orange,
golden yellow, green and deep blue |
Canada |
|
1.520 |
1.525 |
1.671 |
1.674 |
1.674 |
1.680 |
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 1996 Sep,
p138-140 |
Ammolite |
1.52 |
1.67 |
0.15 |
0.15 |
2.79 |
2.81 |
|
Alberta,
Canada |
hardness =
4 |
|
|
|
|
|
|
|
|
|
The Journal of Gemmology 1981
Vol 17, N°6, p406-415 |
Ammolite |
1.525 |
1.67 |
0.135 |
0.145 |
2.76 |
2.84 |
all colours, with red and green
most abundant; blue is rare and purple extremely
rare |
|
normally opaque; transparent or
translucent in very thin sheets; red is relatively tough, but blue and
purple are brittle |
1.525 |
1.530 |
|
|
1.665 |
1.670 |
|
iridescent is
inert |
iridescent is
inert |
Gems & Gemology 2001 spring,
p4-25 |
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 |
Ammolite |
1.520 |
1.670 |
0.150 |
0.150 |
2.800 |
2.950 |
|
|
|
|
|
|
http://www.gemmology.be
|
Ammolite |
1.520 |
1.670 |
0.150 |
0.150 |
2.800 |
2.950 |
1.520 |
1.520 |
|
|
1.670 |
1.670 |
http://www.geminterest.com
|
Ammolite |
1.520 |
1.670 |
0.150 |
0.150 |
2.800 |
2.800 |
1.520 |
1.520 |
|
|
1.670 |
1.670 |
Joel Arem, Color Encyclopedia
of Gemstones, 1987
|
Ammolite |
1.520 |
1.670 |
0.150 |
0.150 |
2.600 |
2.850 |
|
|
|
|
|
|
Tables of Gemstone
Identification, Roger Dedeyne, Ivo Quintens, 2007
|
Ammolite |
1.520 |
1.68 |
0.155 |
0.155 |
2.6 |
2.85 |
|
|
|
|
|
|
Gemology Tools Professional 2010
|
CAUSE OF COLOUR
MINERAL INCLUSIONS
Inclusion |
Stone |
Reference |
pyriet |
Ammolite |
The Australian Gemmologist Nov
1987 p304 |
LOCALITIES