|
INVESTIGATIONS
Stone |
RI min |
RI max |
Dens min |
Dens max |
Colour |
Location |
Info |
Spectrum |
UVS |
UVL |
Reference |
Amber |
1,5 |
1,54 |
1 |
1,05 |
yellow to brownish
yellow, brownish red |
Sumatra, Indonesia |
1.92 to 14.45 cts |
|
chalky blue |
strong chalky blue |
The Australian
Gemmologist 2013 Oct-Dec, Vol 25, N)4, p142-145 |
Amber |
1,53 |
1,54 |
1,03 |
1,09 |
yellow, greenish yellow,
brownish yellow, brown, orange-yellow |
Khamti, Sagaing Region,
Myanmar |
RI spot readings |
|
weak ch bluealky blue or
greenish |
strong chalky blue |
The Journal of Gemmology
2020 Vol 37 (3), p314-322 |
Amber |
1,538 |
1,54 |
1,03 |
1,04 |
dark golden yellow,
orange-red, orange |
Mexico |
|
|
|
weak chalky white to
strong light blue |
The Journal of Gemmology
2017 Vol 35-8, p 752-765 |
Amber (heat treated) |
1,54 |
1,55 |
1,05 |
1,06 |
green |
|
two stage heating process |
IR : 820 cm-1
feature (not in untreated amber) |
dark green |
whitish blue |
Gems & Gemology 2009
Fall, p158-177 |
Amber |
1,54 |
1,55 |
1,03 |
1,05 |
white, yellow, yellowish
brown, reddish brown, dark brown |
Hti Lin, Myanmar |
|
|
weak chalky blue |
very strong chalky blue |
The Journal of Gemmology
2015 Vol 34, No7, p606-615 |
Amber |
1,54 |
1,55 |
1,03 |
1,06 |
pale ‘lemon’ yellow,
‘honey’ yellow and brownish yellow to dark brown, ‘cherry’ red and ‘tea-leaf’ green to dark greenish
brown |
Khamti, Sagaing Region,
Myanmar |
32 samples, 0.72 to 55.67
ct |
|
weak chalky blue to light
purple, pink |
strong, chalky blue to
light purple, pink |
The Journal of Gemmology
2018 36(2), p 106-107 |
Amber |
1,54 |
1,543 |
1,03 |
1,07 |
yellow to orangy red |
Phu Quoc, Vietnam |
|
|
strong to very strong
light blue |
strong to very strong
light blue |
Gems & Gemology 2022
Summer, 184-194 |
Amber |
|
|
1,02 |
1,05 |
gold, reddish brown, red,
yellowish white, greenish yellow |
Myanmar |
transparent to opaque |
|
|
violetish blue, whitish
blue |
The Journal of Gemmology
2020 Vol 37 (2), p144-161 |
TABLES
Stone |
RI
min |
RI
max |
Dens
min |
Dens
max |
Reference |
Amber |
1.535 |
1.545 |
1.05 |
1.15 |
Gemmo.eu 2014 |
Amber |
1.537 |
1.545 |
1.05 |
1.1 |
http://www.geminterest.com |
Amber |
1.539 |
1.545 |
1 |
1.1 |
Tables of
Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 |
Amber |
1.539 |
1.545 |
1.05 |
1.1 |
Gemmological Tables, Ulrich Henn,
2004 |
Amber |
1.539 |
1.545 |
1.06 |
1.1 |
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
Amber |
1.539 |
1.545 |
1.03 |
1.1 |
John Sinkakas,
Gemstone and mineral data book,1972 |
Amber |
1.539 |
1.545 |
1 |
1.1 |
Gemology Tools Professional 2010 |
Amber |
1.54 |
1.54 |
1.03 |
1.1 |
Gems, R Webster,
5th edition 1994 |
Amber |
1.54 |
1.54 |
1.06 |
1.1 |
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
Amber |
1.54 |
1.54 |
1.05 |
1.1 |
http://www.gemmology.be |
Amber |
1.54 |
1.54 |
1.05 |
1.1 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
Amber |
1.54 |
1.54 |
1.05 |
1.096 |
Joel Arem, Color
Encyclopedia of Gemstones, 1987 |
CAUSE OF
COLOUR
Stone |
Colour |
Cause
of colour |
Reference |
Amber |
blue and green |
fluorescence
under visible light in Dominican amber, blue to light scattering in Baltic
amber |
Gems & Gemology Summer 1988 |
Amber |
green (treated) |
appears to
result from light scattering from fine clouds of inclusions |
Gems & Gemology Fall 2009 p161 |
Amber |
yellow, orange, red, brown |
charge transfer
processes in large organic molecules |
Gems & Gemology Summer 1988 |
MINERAL
INCLUSIONS
Inclusion |
Stone |
Reference |
feldspar |
Amber |
Gems & Gemology 2010 Winter, p309 |
jet |
Amber |
Gems & Gemology 2010 Winter, p309 |
pyrite |
Amber |
Gems & gemology 1985 summer p108 |
quartz |
Amber |
Gems & Gemology 2010 Winter, p309 |
LOCALITIES
STONE |
LOCALITIES |
REFERENCE |
|||
Amber |
Fushun Mine, Fushun |
Shenyang area |
Liaoning |
China |
www.mindat.org |
Amber |
|
Cordillera Septentrional |
Santiago province |
Dominican Republic |
www.mindat.org |
Amber |
|
Hukawng Valley |
Kachin State |
Myanmar |
www.mindat.org |
Amber |
|
Gdansk |
Pomeranian Voivodeship |
Poland |
www.mindat.org |
Amber |
|
Phu Quoc |
|
Vietnam |
Gems & Gemology
Summer 2022 |