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Measurements: 51
x 50 x 30 mm
Description:
This specimen
is a combination of very
gemmy, glossy epidote crystals, pale green prehnite crystals,
numerous
calcite crystals and only a few very minute analcime crystals. All
these
crystals sit on a piece of basalt matrix.
There is no notable damage to the specimen.
Weight of Specimen: 52 g
Chemical
Composition: Ca2Fe3+2.25Al0.75(SiO4)3(OH) (epidote)
Ca2Al2Si3O10(OH)2 (prehnite)
CaCO3 (calcite)
NaAl(Si2O6)•(H2O) (analcime)
Hardness
on Mohs Scale: (prehnite) 6-6.5
(calcite)
3
(analcime) 5
(epidote)
7
Location: Brandberg,
Namibia.
Specimen
Code: NBB
210
US
$ SOLD .
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