|
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 |
Sinhalite |
1.662 |
1.704 |
0.042 |
0.042 |
3.49 |
3.49 |
light yellow |
Sri Lanka |
0.86ct |
|
|
|
|
|
|
|
inert |
inert |
ACAM Lab
2306 |
Sinhalite |
1.662 |
1.7 |
0.038 |
0.038 |
3.48 |
3.48 |
orangy yellow |
Ratnapura, Sri Lanka |
14.36ct |
|
|
|
|
|
|
line at 455nm |
inert |
inert |
GIA Gem Database 34892 |
Sinhalite |
1.664 |
1.708 |
0.044 |
0.044 |
3.48 |
3.48 |
green-yellow |
Sri Lanka |
1.39ct |
1.664 |
1.664 |
1.692 |
1.692 |
1.708 |
1.708 |
|
inert |
inert |
ACAM Lab
3885 |
Sinhalite |
1.665 |
1.7 |
0.035 |
0.035 |
3.47 |
3.47 |
colourless (very faint brownish tint) |
Sri Lanka |
2.47ct |
|
|
|
|
|
|
faint absorption line in the blue |
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 1999 Jul p106 |
Sinhalite |
1.666 |
1.706 |
0.038 |
0.038 |
3.48 |
3.5 |
|
Ohngaing, Mogok, Birma |
|
1.666 |
1.668 |
|
|
1.704 |
1.706 |
452, 463, 475, 493nm lines, broad band in the violet |
inert |
inert |
Gems & Gemology 2007 winter, p382 |
Sinhalite |
1.667 |
1.705 |
0.038 |
0.038 |
3.47 |
3.47 |
pale yellow |
|
|
1.667 |
1.667 |
1.697 |
1.697 |
1.705 |
1.705 |
|
|
|
Gems & Gemology 1952 Summer,
p173-175 |
Sinhalite |
1.667 |
1.7 |
0.033 |
0.033 |
3.49 |
3.49 |
orangy yellow |
Eheliyagoda, Sabaragamuwa Province, Sri
Lanka |
10.88ct |
|
|
|
|
|
|
lines at 455, 465 and 507nm |
inert |
inert |
GIA Gem Database 35589 |
Sinhalite |
1.667 |
1.7 |
0.033 |
0.033 |
3.48 |
3.48 |
yellowish orange |
Sri Lanka |
40.69ct |
|
|
|
|
|
|
lines at 456, 500 nm |
inert |
inert |
GIA Gem Database 34104 |
Sinhalite |
1.668 |
1.702 |
0.034 |
0.034 |
3.54 |
3.54 |
yellow-brown |
Sri Lanka |
1.8ct |
1.668 |
1.668 |
1.684 |
1.684 |
1.702 |
1.702 |
|
inert |
inert |
ACAM Lab
2305 |
Sinhalite |
1.669 |
1.704 |
0.035 |
0.035 |
3.48 |
3.49 |
olive green |
Elahera, Sri Lanka |
|
|
|
|
|
|
|
|
|
|
Zeitschrift der Deutschen Gemmologischen
Gesellschaft 1985 34, Nr 1/2, p13-19 |
Sinhalite |
1.669 |
1.706 |
0.036 |
0.037 |
3.48 |
3.49 |
near colourless, brownish yellow |
Elahera, Sri Lanka |
|
1.669 |
1.669 |
1.702 |
1.702 |
1.706 |
1.706 |
525, 493, 475, 463, 452, 435nm |
inert |
inert |
Gems & Gemology 1986 Summer, p91 |
Sinhalite |
1.669 |
1.707 |
0.038 |
0.038 |
3.48 |
3.48 |
brown |
|
|
1.669 |
1.669 |
1.699 |
1.699 |
1.707 |
1.707 |
|
|
|
Gems & Gemology 1952 Summer,
p173-175 |
Sinhalite |
1.669 |
1.707 |
0.038 |
0.038 |
3.51 |
3.51 |
light yellowish green |
|
1.77ct |
1.669 |
1.669 |
1.687 |
1.687 |
1.707 |
1.707 |
|
|
|
ACAM Lab
557 |
Sinhalite |
1.67 |
1.7 |
0.03 |
0.03 |
3.5 |
3.5 |
dark orange |
Sri Lanka |
11.24ct |
|
|
|
|
|
|
broad absorption below 430nm; lines at 452, 457, 468, 480 and 500nm |
inert |
inert |
GIA Gem Database 34111 |
Sinhalite |
1.671 |
1.708 |
0.037 |
0.037 |
3.49 |
3.49 |
dark brown |
|
|
1.671 |
1.671 |
1.700 |
1.700 |
1.708 |
1.708 |
|
|
|
Gems & Gemology 1952 Summer,
p173-175 |
Sinhalite |
1.674 |
1.703 |
0.029 |
0.029 |
3.55 |
3.55 |
greenish brown |
Sri Lanka |
|
|
|
|
|
|
|
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 1998 Sep, p169 |
Sinhalite |
1.678 |
1.705 |
0.027 |
0.027 |
3.5 |
3.5 |
brownish yellow |
Eheliyagoda, Sri Lanka |
18.50ct |
|
|
|
|
|
|
lines at 452, 457, 470, 484, 500nm |
inert |
inert |
GIA Gem Database 34891 |
Sinhalite |
1.68 |
1.7 |
0.02 |
0.02 |
3.47 |
3.47 |
orangy yellow |
Eheliyagoda, Sri Lanka |
45.68ct |
|
|
|
|
|
|
lines at 456 and 478nm, band below 420nm |
inert |
inert |
GIA Gem Database 34917 |
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 |
Sinhalite |
1.665 |
1.712 |
0.036 |
0.042 |
3.46 |
3.48 |
1.665 |
1.676 |
|
|
1.702 |
1.712 |
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
Sinhalite |
1.665 |
1.712 |
0.035 |
0.042 |
3.46 |
3.5 |
1.665 |
1.676 |
|
|
1.704 |
1.712 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
Sinhalite |
1.665 |
1.712 |
0.035 |
0.037 |
3.47 |
3.5 |
|
|
|
|
|
|
http://www.gemmology.be |
Sinhalite |
1.665 |
1.712 |
0.035 |
0.037 |
3.475 |
3.5 |
1.665 |
1.676 |
1.697 |
1.697 |
1.705 |
1.712 |
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
Sinhalite |
1.665 |
1.712 |
0.035 |
0.039 |
3.45 |
3.5 |
1.665 |
1.676 |
1.694 |
1.704 |
1.704 |
1.712 |
http://www.geminterest.com |
Sinhalite |
1.665 |
1.712 |
0.035 |
0.042 |
3.47 |
3.5 |
1.665 |
1.678 |
1.697 |
1.697 |
1.704 |
1.712 |
Tables of Gemstone Identification, Roger Dedeyne,
Ivo Quintens, 2007 |
Sinhalite |
1.665 |
1.712 |
0.036 |
0.039 |
3.46 |
3.5 |
|
|
|
|
|
|
Gemology Tools Professional 2010 |
Sinhalite |
1.666 |
1.71 |
0.037 |
0.042 |
3.46 |
3.5 |
1.666 |
1.672 |
1.697 |
1.701 |
1.704 |
1.710 |
Gemmological Tables, Ulrich Henn,
2004 |
Sinhalite |
1.666 |
1.713 |
0.034 |
0.039 |
3.45 |
3.51 |
|
|
|
|
|
|
Gemmo.eu
|
Sinhalite |
1.668 |
1.707 |
0.038 |
0.04 |
3.48 |
3.54 |
|
|
|
|
|
|
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
Sinhalite |
1.67 |
1.71 |
0.038 |
0.038 |
3.47 |
3.49 |
|
|
|
|
|
|
Gems, R Webster, 5th edition 1994 |
Sinhalite |
|
|
0.038 |
0.038 |
3.47 |
3.49 |
|
|
|
|
|
|
John Sinkakas, Gemstone and mineral data
book,1972 |
CAUSE OF
COLOUR
Stone |
Colour |
Cause
of colour |
Reference |
Sinhalite |
brown |
O˛+- -> Feł+ charge transfer and Fe˛+
in octahedral coordination |
Gems & Gemology Summer 1988 |
MINERAL
INCLUSIONS
Inclusion |
Stone |
Reference |
rutile |
Sinhalite |
The Journal of Gemmology 1986, 20, 2, p98-99 |
LOCALITIES
STONE |
LOCALITIES |
REFERENCE |
|||
Sinhalite |
Ohngaing (Ohn Gaing, Ohn Kai) |
Mogok |
Mandalay |
Myanmar |
Gems & Gemology 2007 winter, p382 |
Sinhalite |
|
Elahera District |
Central Province |
Sri Lanka |
Zeitschrift der Deutschen Gemmologischen
Gesellschaft 1985,34, Nr 1/2, p13-19 |
Sinhalite |
Matale |
Matale District |
Central Province |
Sri Lanka |
Gemmologie Jul 1999, p90 |
Sinhalite |
Embilipitiya (Embilipitya; Ambilipitiya) |
Ratnapura District |
Sabaragamuwa province |
Sri Lanka |
Gemmologie Jul 1999, p90 |
Sinhalite |
Deniyaya, Matara |
Matara District |
Southern Province |
Sri Lanka |
Gemmologie Jul 1999, p90 |
Sinhalite |
|
Avissawella |
Western Province |
Sri Lanka |
Gemmologie Jul 1999, p90 |
CHEMICAL DATA
(%)