|
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 |
Variscite |
1,55 |
1,56 |
|
|
2,12 |
2,23 |
grey-green |
Yauli, Peru |
RI spot reading |
|
|
|
|
|
|
|
inert |
weak green-yellow |
Gems & Gemology 2011
Fall, p251 |
Variscite |
1,561 |
1,589 |
0,028 |
0,028 |
2,55 |
2,55 |
green |
Hunsrück, Germany |
|
|
|
|
|
|
|
|
|
|
Zeitschrift der Deutschen
Gemmologischen Gesellschaft 1988 36, Nr3/4, p 170 |
Variscite |
1,57 |
1,57 |
|
|
2,43 |
2,43 |
turquoise |
|
|
|
|
|
|
|
|
weak band 430-400 |
|
white |
ACAM labo |
Variscite |
1,57 |
1,582 |
|
|
2,49 |
2,55 |
light bluish green, light
to dark green, brown matrix |
Woodlands Station,
Western Australia |
opaque to translucent,
chelsea: grey to pale pink |
|
|
|
|
|
|
diffuse bands 685nm,
650nm, 610nm, absorption of blue-violet |
inert |
inert |
The Journal of Gemmology
2008 Vol31, N°3-4, p111-124 |
Variscite |
1,57 |
1,59 |
|
|
|
|
turquoise |
|
cabochon 20.16ct ,
resembling spiderweb turquoise |
|
|
|
|
|
|
|
|
|
Gems & Gemology 2006
Spring, p61 |
Variscite |
1,58 |
1,58 |
|
|
2,46 |
2,46 |
bluish, opaque |
|
|
|
|
|
|
|
|
|
|
|
ACAM labo |
Variscite |
1,58 |
1,58 |
|
|
2,57 |
2,57 |
light green, some with
dark veins, some with spiderweb patterning |
Koursk mine, Yazd
Province, Central Iran |
cabochons up to 4cm,
opaque, RI spot |
|
|
|
|
|
|
|
inert |
very weak |
The Journal of Gemmology
2022 38(4), p319 |
Variscite |
|
|
|
|
2,32 |
2,36 |
white to light blue to
green |
Tajikistan |
hardness 4-5 |
|
|
|
|
|
|
|
inert |
inert |
Gems & Gemology 2016
Spring, p 60-65 |
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 |
Variscite |
1.55 |
1.594 |
0.01 |
0.031 |
2.2 |
2.6 |
1.550 |
1.560 |
|
|
1.580 |
1.594 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
Variscite |
1.55 |
1.59 |
0.03 |
0.03 |
2.4 |
2.6 |
1.550 |
1.560 |
|
|
1.580 |
1.590 |
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
Variscite |
1.55 |
1.595 |
0.02 |
0.033 |
2.2 |
2.62 |
|
|
|
|
|
|
Gemmo.eu 2013 |
Variscite |
1.55 |
1.594 |
0.031 |
0.031 |
2.57 |
2.61 |
1.550 |
1.563 |
1.565 |
1.588 |
1.570 |
1.594 |
Michael
O'Donoghue, Gems: Their Sources, Descriptions and Identification (2006), 873pp
|
Variscite |
1.554 |
1.593 |
|
|
2.4 |
2.6 |
|
|
|
|
|
|
Gemology Tools Professional 2010 |
Variscite |
1.56 |
1.56 |
|
|
2.4 |
2.57 |
|
|
|
|
|
|
John Sinkakas,
Gemstone and mineral data book,1972 |
Variscite |
1.56 |
1.593 |
0.03 |
0.03 |
2.42 |
2.58 |
|
|
|
|
|
|
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
Variscite |
1.56 |
1.594 |
0.01 |
0.031 |
2.4 |
2.6 |
1.560 |
1.570 |
1.565 |
1.584 |
1.570 |
1.594 |
http://www.geminterest.com |
Variscite |
1.56 |
1.56 |
|
|
2.4 |
2.6 |
|
|
|
|
|
|
Gems, R Webster,
5th edition 1994 |
Variscite |
1.563 |
1.594 |
0.031 |
0.031 |
2.2 |
2.57 |
1.563 |
1.563 |
1.588 |
1.588 |
1.594 |
1.594 |
Joel Arem, Color
Encyclopedia of Gemstones, 1987 |
Variscite |
1.563 |
1.594 |
0.031 |
0.031 |
2.4 |
2.6 |
1.563 |
1.563 |
1.588 |
1.588 |
1.594 |
1.594 |
Gemmological Tables, Ulrich Henn,
2004 |
Variscite |
1.563 |
1.594 |
0.031 |
0.031 |
2.2 |
2.57 |
|
|
|
|
|
|
http://www.gemmology.be |
Variscite |
1.563 |
1.594 |
0.031 |
0.031 |
2.2 |
2.57 |
|
|
|
|
|
|
Tables of
Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 |
CAUSE OF
COLOUR
Stone |
Colour |
Cause
of colour |
Reference |
Variscite |
green |
Cr³+ presumably
in octahedral coordination |
Gems & Gemology Summer 1988 |
Variscite |
green |
V³+ |
http://minerals.caltech.edu |
MINERAL
INCLUSIONS
LOCALITIES
STONE |
LOCALITIES |
REFERENCE |
|||
Variscite |
Low Mill, Woodlands
station |
Upper Gascoyne Shire |
Western Australia |
Australia |
The Journal of Gemmology
2008 Vol31, N°3-4, p111-124 |
Varisciet |
Kushk Mine |
Bafq (Bafgh) |
Yazd Province |
Iran |
www.mindat.org |
Variscite |
Little Green Monster
Variscite Mine, Clay Canyon, Clay Canyon, Fairfield |
Utah County |
Utah |
USA |
Michael O'Donoghue, Gems:
Their Sources, Descriptions and Identification (2006), 873pp |
CHEMICAL DATA
(%)
Stone |
Colour |
Locality |
Reference |
SiO2 |
Al2O3 |
MnO |
TiO2 |
CaO |
Na2O |
Cr2O3 |
V2O3 |
Fe2O3 |
K2O |
F |
P2O5 |
PbO |
SO3 |
As2O3 |
|
Variscite |
|
Woodlands Station, Western Australia |
Australia |
The Journal of
Gemmology 2008, Vol31, N°3-4, p119 |
0.47 |
31.6 |
|
0.14 |
|
0.08 |
0.09 |
0.35 |
1.37 |
0.13 |
0.05 |
45.3 |
|
0.43 |
|
Variscite |
|
Woodlands Station, Western Australia |
Australia |
The Journal of
Gemmology 2008, Vol31, N°3-4, p119 |
1.04 |
32.1 |
|
0.31 |
|
0.1 |
0.21 |
0.32 |
1.08 |
0.02 |
0.1 |
45.9 |
|
0.09 |
|
Variscite |
|
Woodlands Station, Western Australia |
Australia |
The Journal of
Gemmology 2008, Vol31, N°3-4, p119 |
0.5 |
30.6 |
|
0.4 |
0.19 |
0.19 |
0.18 |
0.46 |
1.86 |
0.06 |
0.11 |
44.4 |
0.08 |
0.31 |
|
Variscite |
|
Woodlands Station, Western Australia |
Australia |
The Journal of
Gemmology 2008, Vol31, N°3-4, p119 |
1.46 |
31.5 |
|
0.29 |
0.05 |
0.12 |
0.16 |
0.5 |
1.27 |
0.02 |
0.07 |
45.7 |
|
0.11 |
|
Variscite |
|
Pannecé |
France |
Gems & Gemology 2016, Spring, p64 |
0.03 |
29.1 |
0.05 |
0.03 |
|
|
0.2 |
0.4 |
0.15 |
|
|
44.7 |
|
|
|
Variscite |
|
Sardinia |
Italy |
Gems & Gemology 2016, Spring, p64 |
1.4 |
28.2 |
0.02 |
0.02 |
|
|
0.3 |
0.4 |
2 |
|
|
44.3 |
|
|
|
Variscite |
|
Ervedosa |
Portugal |
Gems & Gemology 2016, Spring, p64 |
0.04 |
29.4 |
0.03 |
0.02 |
|
|
0.4 |
0.11 |
1.5 |
|
|
45.3 |
|
|
|
Variscite |
slightly green |
|
Tajikistan |
Gems & Gemology 2016, Spring, p64 |
|
25.68 |
|
0.15 |
0.16 |
0.11 |
0.11 |
0.15 |
9.06 |
|
|
43.61 |
|
0.76 |
0.46 |
Variscite |
white with green hue |
|
Tajikistan |
Gems & Gemology 2016, Spring, p64 |
|
27.05 |
|
|
|
0.18 |
0.1 |
0.16 |
5.99 |
0.13 |
|
44.47 |
|
0.68 |
0.29 |
Variscite |
bluish green |
|
Tajikistan |
Gems & Gemology 2016, Spring, p64 |
|
25.91 |
|
|
|
0.12 |
0.16 |
0.14 |
8.3 |
|
|
43.63 |
|
0.32 |
0.28 |
Variscite |
bright green |
|
Tajikistan |
Gems & Gemology 2016, Spring, p64 |
|
25.72 |
|
|
|
|
0.16 |
0.13 |
9.4 |
0.14 |
|
42.76 |
|
0.36 |
0.55 |
Variscite |
|
Utah |
USA |
Gems & Gemology 2016, Spring, p64 |
0.06 |
29.3 |
0.03 |
0.08 |
|
|
0.14 |
0.64 |
0.05 |
|
|
44.4 |
|
|
|