|
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 |
Epidote |
1.72 |
1.754 |
0.034 |
0.034 |
3.41 |
3.41 |
|
Mali |
|
1.720 |
1.720 |
1.739 |
1.739 |
1.754 |
1.754 |
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 1996 Dec, p155-156 |
Epidote |
1.72 |
1.741 |
0.019 |
0.02 |
3.36 |
3.38 |
|
Sri Lanka |
|
1.720 |
1.721 |
1.730 |
1.731 |
1.739 |
1.741 |
|
|
|
Zeitschrift der Deutschen Gemmologischen
Gesellschaft 1991 Apr, p3 |
Epidote |
1.72 |
1.738 |
0.018 |
0.018 |
3.44 |
3.44 |
brown |
Mtito Andei, Kenya |
2.85ct |
|
|
|
|
|
|
band at 455-465 and 475-490nm |
inert |
inert |
GIA Gem Database 34362 |
Epidote |
1.72 |
1.738 |
0.018 |
0.018 |
3.42 |
3.42 |
|
Tsumeb, Namibia |
4.21ct |
|
|
|
|
|
|
band at 455-465 and 475-485nm |
inert |
inert |
GIA Gem Database 34704 |
Epidote |
1.721 |
1.769 |
0.02 |
0.035 |
3.39 |
3.42 |
|
Minas Gerais, Brazil |
|
1.721 |
1.734 |
1.735 |
1.756 |
1.741 |
1.769 |
|
|
|
Zeitschrift der Deutschen Gemmologischen
Gesellschaft 1991 Apr, p3 |
Epidote |
1.721 |
1.748 |
0.027 |
0.027 |
3.37 |
3.37 |
|
Switzerland |
|
1.721 |
1.721 |
1.736 |
1.736 |
1.748 |
1.748 |
|
|
|
Zeitschrift der Deutschen Gemmologischen
Gesellschaft 1991 Apr, p3 |
Epidote |
1.724 |
1.748 |
0.024 |
0.024 |
3.4 |
3.4 |
|
Mozambique |
|
1.724 |
1.724 |
1.734 |
1.734 |
1.748 |
1.748 |
|
|
|
Zeitschrift der Deutschen Gemmologischen
Gesellschaft 1991 Apr, p3 |
Epidote |
1.725 |
1.752 |
0.025 |
0.027 |
3.43 |
3.44 |
|
California, USA |
|
1.725 |
1.727 |
1.736 |
1.739 |
1.750 |
1.752 |
|
|
|
Zeitschrift der Deutschen Gemmologischen
Gesellschaft 1991 Apr, p3 |
Epidote |
1.725 |
1.743 |
0.018 |
0.018 |
3.43 |
3.43 |
very dark brownish yellow |
|
9.72ct |
|
|
|
|
|
|
broad absorption below 420nm, line at 460nm |
inert |
inert |
GIA Gem Database 34004 |
Epidote |
1.725 |
1.735 |
0.01 |
0.01 |
3.43 |
3.43 |
brownish orange |
Sri Lanka |
9.02ct |
|
|
|
|
|
|
band at 457-462nm |
inert |
inert |
GIA Gem Database 34830 |
Epidote |
1.731 |
1.773 |
0.031 |
0.036 |
3.37 |
3.44 |
|
Knappenwand, Untersulzbachtal, Austria |
|
1.731 |
1.738 |
1.748 |
1.753 |
1.761 |
1.773 |
|
|
|
Zeitschrift der Deutschen Gemmologischen
Gesellschaft 1991 Apr, p1-9 |
Epidote |
1.732 |
1.767 |
0.035 |
0.035 |
3.44 |
3.44 |
|
Elahera, Sri Lanka |
|
1.732 |
1.732 |
1.746 |
1.746 |
1.767 |
1.767 |
457, 455 (strong) |
inert |
inert |
Gems & Gemology 1986 Summer, p91 |
Epidote |
1.738 |
1.772 |
0.034 |
0.034 |
3.49 |
3.49 |
dark green, transparent |
Pakistan |
0.71 ct, tawmawite |
|
|
|
|
|
|
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2008 Dec, p122 |
Epidote |
1.739 |
1.779 |
0.04 |
0.04 |
|
|
very dark green |
|
5ct |
|
|
|
|
|
|
a broad band at 455 nm, a faint line at 470nm, a cut-off at 430nm |
|
|
Gems & Gemology 1987 Summer p104 |
Epidote |
|
|
|
|
3.4 |
3.4 |
brown |
California, USA |
2.97ct |
|
|
|
|
|
|
lines at 455nm and 475nm |
inert |
inert |
GIA Gem Database 35187 |
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 |
Epidote |
1.713 |
1.78 |
0.034 |
0.039 |
3.3 |
3.48 |
1.713 |
1.735 |
|
|
1.733 |
1.780 |
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
Epidote |
1.714 |
1.798 |
0.014 |
0.05 |
3.3 |
3.5 |
|
|
|
|
|
|
Gemmo.eu 2013 |
Epidote |
1.715 |
1.797 |
0.005 |
0.053 |
3.25 |
3.5 |
1.715 |
1.751 |
|
|
1.734 |
1.797 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
Epidote |
1.715 |
1.773 |
0.014 |
0.039 |
3.3 |
3.5 |
1.715 |
1.734 |
1.722 |
1.753 |
1.729 |
1.773 |
Gemmological Tables, Ulrich Henn,
2004 |
Epidote |
1.715 |
1.797 |
0.015 |
0.049 |
3.38 |
3.49 |
|
|
|
|
|
|
http://www.gemmology.be |
Epidote |
1.715 |
1.797 |
0.015 |
0.051 |
3.25 |
3.52 |
1.715 |
1.751 |
1.725 |
1.784 |
1.734 |
1.797 |
http://www.geminterest.com |
Epidote |
1.715 |
1.797 |
0.015 |
0.049 |
3.38 |
3.49 |
1.715 |
1.751 |
1.725 |
1.784 |
1.734 |
1.797 |
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
Epidote |
1.715 |
1.797 |
0.015 |
0.049 |
3.3 |
3.5 |
1.715 |
1.751 |
1.725 |
1.784 |
1.734 |
1.797 |
Tables of Gemstone Identification, Roger Dedeyne,
Ivo Quintens, 2007 |
Epidote |
1.715 |
1.797 |
0.015 |
0.049 |
3.38 |
3.49 |
|
|
|
|
|
|
Gemology Tools Professional 2010 |
Epidote |
1.729 |
1.78 |
0.019 |
0.045 |
3.3 |
3.5 |
|
|
|
|
|
|
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
Epidote |
1.736 |
1.77 |
0.034 |
0.034 |
3.25 |
3.51 |
|
|
|
|
|
|
John Sinkakas, Gemstone and mineral data
book,1972 |
Epidote |
1.736 |
1.77 |
0.034 |
0.034 |
3.25 |
3.5 |
|
|
|
|
|
|
Gems, R Webster, 5th edition 1994 |
CAUSE OF
COLOUR
Stone |
Colour |
Cause
of colour |
Reference |
Epidote |
green and brown |
Fe³+ in distorted octahedral coordination |
Gems & Gemology Summer 1988 |
MINERAL
INCLUSIONS
Inclusion |
Stone |
Reference |
actinolite |
Epidote |
Zeitschrift der Deutschen Gemmologischen
Zeitschrift, 1990, Sep, p1-9 |
apatite |
Epidote |
Zeitschrift der Deutschen Gemmologischen
Zeitschrift, 1990, Sep, p1-9 |
calcite |
Epidote |
Zeitschrift der Deutschen Gemmologischen
Zeitschrift, 1990, Sep, p1-9 |
LOCALITIES
STONE |
LOCALITIES |
REFERENCE |
|||
Epidote |
Knappenwand, Untersulzbachtal |
Hohe Tauern |
Salzburg |
Austria |
Zeitschrift der Deutschen Gemmologischen
Gesellschaft 1991, Apr p1-9 |
Epidote |
Ankazobe Department, Ankazobe Pegmatite Field |
Central Merina Region |
Antananarivo Province |
Madagascar |
Gemmologie, Dez 1999, p196 |
Epidote |
Mahazoma epidote locality, Mahazoma Commune,
Maevatanana District |
Betsiboka Region |
Mahajanga (Majunga) Province |
Madagascar |
Behier, J. (1960): Annales Géologiques de Madagascar
XXIX, Tananarive, 78p [p.35] |
Epidote |
|
Same |
Kilimanjaro Region |
Tanzania |
Gems & Gemology 2000 winter p325 |
Epidote |
|
Babati |
Manyara Region |
Tanzania |
Gemmologie, 1997, Mar, p31 |
CHEMICAL DATA