Measurements:
90
x 65 x 56 mm
Description: Two quartz crystals, the largest (45 x 15 x 15 mm) with a very faint amethyst colouring, gas inclusions and a few small moving bubbles, sit on an unknown matrix (possibly chalcedony) which, in turn, sits on a thin basalt matrix. The (?)chalcedony has a thin, black coating of a mineral unknown to us.
The
matrix has been trimmed on two sides, and the specimen displays well on
a flat surface.
Neither of the crystals have any
notable damage.
Weight
of Specimens:
171.8 g
Chemical
Composition:
SiO2
Hardness on Mohs Scale: 7
Location:
Specimen Code: NBB 069
US $ 120
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