|
INVESTIGATIONS
|
Stone |
RI min |
RI max |
Dens min |
Dens max |
Colour |
Location |
Info |
Spectrum |
UVS |
UVL |
Reference |
|
Ivory
hornbill |
1.51 |
1.54 |
|
|
pale to bright yellow, orangy
yellow, red |
|
beads and
carvings |
|
yellow: inert to very weak; red
: inert to weak bluish |
yellow: inert to whitish, red :
inert to bluish |
The Journal of Gemmology 2014
Vol 34/N°1, p42-49 |
|
Ivory
hornbill |
1.52 |
1.53 |
1.3 |
1.3 |
yellowish brown,
carmine |
|
translucent, hardness 3, hot
point: burning hair |
|
|
greenish |
The Journal of Gemmology 1982
Vol18, N°1, p8-19 |
|
Ivory
hornbill |
1.55 |
1.55 |
1.28 |
1.28 |
|
|
hardness 2.5, hotpoint
reaction: burnt hair |
|
white to bluish
white |
|
Gems & Gemology 1981 summer
p96-97 |
|
Ivory
hornbill |
1.55 |
1.6 |
|
|
light brownish yellow with a
few carmine red to dark brown areas |
|
burnt hair odor with hot needle
test |
|
chalky bluish white (brownish
yellow area), strong red (red area) |
chalky bluish white (brownish
yellow area), strong red (red area) |
Gems & Gemology 2001 Winter, p
323 |
TABLES
|
Stone |
RI min |
RI max |
Dens min |
Dens max |
Reference |
|
Ivory
hornbill |
1.52 |
1.53 |
1.26 |
1.35 |
Tables of Gemstone
Identification, Roger Dedeyne, Ivo Quintens, 2007
|
CAUSE OF COLOUR
MINERAL INCLUSIONS
LOCALITIES
CHEMICAL DATA
(%)