|
INVESTIGATIONS
|
Stone |
RI min |
RI max |
Biref min |
Biref max |
Dens min |
Dens max |
Colour |
Location |
Info |
ne min |
ne max |
no min |
no max |
Spectrum |
UVS |
UVL |
Reference |
|
Phenakite |
1,648 |
1,664 |
0,016 |
0,016 |
2,959 |
2,959 |
colourless |
Franquiera, Spain |
transparent |
1,664 |
1,664 |
1,648 |
1,648 |
|
|
|
The Journal of Gemmology
1997 Vol 25, N°5, p340-357 |
|
Phenakite |
1,65 |
1,665 |
0,015 |
0,015 |
2,97 |
2,97 |
|
Minas Gerais, Brazil |
33.15ct |
|
|
|
|
|
inert |
inert |
GIA Gem Database 34089 |
|
Phenakite |
1,65 |
1,667 |
0,017 |
0,017 |
2,97 |
2,97 |
colourless |
Sri Lanka |
0.48ct |
|
|
|
|
|
pink |
violet-red |
ACAM Lab 2297 |
|
Phenakite |
1,65 |
1,668 |
0,017 |
0,018 |
2,96 |
2,97 |
|
Zambia |
0.45ct, 1.09ct |
1,650 |
1,651 |
1,668 |
1,668 |
|
|
|
ACAM Lab 888 |
|
Phenakite |
1,651 |
1,668 |
0,017 |
0,017 |
2,97 |
2,97 |
colourless |
Russia |
15.53ct |
|
|
|
|
|
inert |
very weak green |
GIA Gem Database 34094 |
|
Phenakite |
1,652 |
1,667 |
0,015 |
0,015 |
2,92 |
2,92 |
yellowish-brown |
|
2.84ct, irradiated |
1,667 |
1,667 |
1,652 |
1,652 |
|
|
|
Gemmologie, Zeitschrift der
Deutschen Gemmologischen Gesellschaft 1996 Dec, p156 |
|
Phenakite |
1,654 |
1,67 |
0,016 |
0,016 |
2,95 |
2,95 |
colourless, light yellow |
Momeik (Molo) , Mogok,
Myanmar |
|
|
|
|
|
|
weak yellow |
weak yellow |
The Australian
Gemmologist 2005 22, p303-309 |
|
Phenakite |
1,654 |
1,67 |
0,016 |
0,016 |
2,93 |
3 |
colourless, white, pale
yellow |
Tokovaia, Ural Mts,
Russia |
|
|
|
|
|
|
|
|
The Journal of Gemmology
1997 Vol 25, N°5, p355 |
|
Phenakite |
1,654 |
1,67 |
0,016 |
0,016 |
2,96 |
2,96 |
light brownish yellow |
|
7.03, 8.98, and 50.36ct,
cat's-eye |
|
|
|
|
|
|
|
Gems & Gemology 2009
Fall, p223 |
|
Phenakite |
1,655 |
1,67 |
0,015 |
0,015 |
3,05 |
3,05 |
colourless |
Ratnapura, Sri Lanka |
5.81ct |
|
|
|
|
no features |
inert |
inert |
GIA Gem Database 34861 |
|
Phenakite |
1,66 |
1,66 |
|
|
2,96 |
2,96 |
colourless |
Sri Lanka |
38.34 ct, cat's-eye, spot
RI |
|
|
|
|
|
inert |
inert |
Gems & Gemology 2009
Winter, p291-292 |
|
Phenakite |
1,66 |
1,677 |
0,017 |
0,017 |
2,96 |
2,96 |
yellow brown |
|
43ct |
|
|
|
|
|
weak greenish |
weak greenish |
iigj lab information
circular 2018 Vol 76, july 2018 |
TABLES
|
Stone |
RI
min |
RI
max |
Biref
min |
Biref
max |
Dens
min |
Dens
max |
ne
min |
ne
max |
no
min |
no
max |
Reference |
|
Phenakite |
1.637 |
1.696 |
0.016 |
0.016 |
2.85 |
3 |
1.666 |
1.696 |
1.637 |
1.654 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
|
Phenakite |
1.649 |
1.672 |
0.015 |
0.02 |
2.89 |
3.02 |
|
|
|
|
Gemmo.eu
|
|
Phenakite |
1.65 |
1.696 |
0.016 |
0.016 |
2.9 |
3 |
|
|
|
|
Gemology Tools Professional 2010 |
|
Phenakite |
1.651 |
1.67 |
0.016 |
0.019 |
2.92 |
2.94 |
1.669 |
1.670 |
1.651 |
1.654 |
Gemmological Tables, Ulrich Henn,
2004 |
|
Phenakite |
1.651 |
1.696 |
0.016 |
0.02 |
2.95 |
2.97 |
1.666 |
1.696 |
1.651 |
1.671 |
Tabellen zur
Edelstein-Bestimmung, Pschichholz FGA, 1975
|
|
Phenakite |
1.653 |
1.67 |
0.015 |
0.015 |
2.9 |
3.01 |
1.670 |
1.670 |
1.653 |
1.655 |
http://www.geminterest.com |
|
Phenakite |
1.654 |
1.67 |
0.015 |
0.016 |
2.95 |
3 |
|
|
|
|
John Sinkakas,
Gemstone and mineral data book,1972 |
|
Phenakite |
1.654 |
1.696 |
0.016 |
0.016 |
2.94 |
2.96 |
1.666 |
1.696 |
1.654 |
1.654 |
Bestimmungstabellen
für Edelsteine, Birgit Günther, 1981 |
|
Phenakite |
1.654 |
1.67 |
0.015 |
0.016 |
2.93 |
3 |
|
|
|
|
http://www.gemmology.be |
|
Phenakite synthetic |
1.654 |
1.67 |
0.015 |
0.016 |
2.95 |
3 |
|
|
|
|
http://www.gemmology.be |
|
Phenakite |
1.654 |
1.67 |
0.016 |
0.016 |
2.93 |
3 |
1.670 |
1.670 |
1.654 |
1.654 |
Joel Arem, Color
Encyclopedia of Gemstones, 1987 |
|
Phenakite |
1.654 |
1.67 |
0.016 |
0.016 |
2.95 |
2.97 |
|
|
|
|
Gems, R Webster,
5th edition 1994 |
|
Phenakite |
1.654 |
1.67 |
0.016 |
0.016 |
2.95 |
3 |
|
|
|
|
Gems, R Webster,
5th edition 1994 |
|
Phenakite |
1.654 |
1.67 |
0.016 |
0.016 |
2.93 |
3 |
|
|
|
|
Tables of
Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 |
CAUSE OF
COLOUR
MINERAL
INCLUSIONS
|
Inclusion |
Stone |
Reference |
|
aikinite |
Phenakite |
Joel Arem, Color
Encyclopedia of Gemstones, 1987 |
|
mica |
Phenakite |
Joel Arem, Color
Encyclopedia of Gemstones, 1987 |
|
molybdenite |
Phenakite |
https://www.gemmo.eu/fr/ |
|
perettiite-Y |
Phenakite |
www.gemresearch.ch |
|
rutile |
Phenakite |
www.gemintrest.com |
|
tusionite |
Phenakite |
Gems & Gemology 2018 Summer, p 228 |
LOCALITIES
|
STONE |
LOCALITIES |
REFERENCE |
|||
|
Phenakite |
Sao Miguel de Piracicaba pegmatite |
Belo Horizonte (50km E) |
Minas Gerais |
Brazil |
Geïllustreerde Mineralen Encyclopedie, Petr Korbel
& Milan Novak, 2001 |
|
Phenakite |
Momeik |
Mogok |
Mandalay |
Myanmar |
The Australian Gemmologist (2005) 22, p308 |
|
Phenakite |
Emerald mines, Malyshevo,
Ekaterinburg (Yekaterinburg; Sverdlovsk) |
Sverdlovskaya Oblast' |
Urals Region |
Russia |
The Journal of Gemmology
2020, Vol 37 (3) p37 |
|
Phenakite |
Kilosa, 80 km west of
Morogoro |
|
|
Tanzania |
Gemmologie, 1997, Mar, p31 |
|
Phenakite |
|
Amelia County |
Virginia |
USA |
Michael O'Donoghue, Gems:
Their Sources, Descriptions and Identification (2006), 873pp |
CHEMICAL DATA
(%)
|
Stone |
Colour |
Locality |
Reference |
SiO2 |
Al2O3 |
MnO |
MgO |
FeO |
TiO2 |
CaO |
Na2O |
Cr2O3 |
V2O3 |
NiO |
|
|
Phenakite |
colourless |
Franqueira |
Spain |
The Journal of
Gemmology 1997, Vol 25, N°5 p 352 |
57.11 |
0.01 |
0.04 |
0.01 |
0.02 |
0.01 |
0.02 |
0.01 |
0.01 |
0.02 |
0.01 |