|
INVESTIGATIONS
|
Stone |
RI min |
RI max |
Dens min |
Dens max |
Colour |
Location |
Info |
Spectrum |
UVS |
UVL |
Reference |
|
Bone |
1.56 |
1.56 |
|
|
dyed
yellowish |
|
parallel banded structure; dye
concentrations in cracks and fissures to appear
older |
|
|
|
Gems & Gemology 2006 summer,
p160 |
|
Bone |
1.56 |
1.56 |
2.01 |
2.01 |
dyed red |
|
coral
imitation |
|
pinkish
orange |
stronger pinkish
orange |
Gems & Gemology 2014 Summer,
p164-166 |
TABLES
|
Stone |
RI min |
RI max |
Dens min |
Dens max |
Reference |
|
Bone |
1.54 |
1.54 |
1.94 |
2.1 |
John Sinkakas, Gemstone and
mineral data book,1972
|
|
Bone |
1.54 |
1.54 |
2 |
2 |
Gems, R Webster, 5th edition
1994
|
|
Bone |
1.54 |
1.57 |
1.98 |
2.01 |
Tables of Gemstone
Identification, Roger Dedeyne, Ivo Quintens, 2007
|
CAUSE OF COLOUR