Measurements: 43
x 36 x 24
mm
Description: A group of quartz crystals (the largest being double terminated) shares a chalcedony matrix with calcite crystals.
The specimen
has a few nicks and contact/pressure marks.
Weight
of
Specimen:
31.1
g
Chemical
Composition: SiO2
(quartz and chalcedony)
CaCO3 (calcite)
Hardness
on Mohs Scale: (quartz and chalcedony) 7
(calcite) 3
Location:
Specimen Code: NBB 095
.
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