Measurements:
47
x 40 x 16 mm
Description: A
specimen consisting of a lovely ball of bladed prehnite (18 mm across)
and several calcite and clear quartz crystals, along with the remains of a
small piece of basalt matrix.
The
prehnite appears to be without damage, while there is some damage to the quartz and calcite
crystals, and to the edges of the specimen. There are a few pressure
and contact marks to some of the quartz and calcite crystals.
Weight
of Specimen: 25.3 g
Chemical
Composition: Ca2Al2Si3O10(OH)2 (prehnite)
SiO2 (quartz)
CaCO3
(calcite)
Hardness on Mohs Scale:
(prehnite) 6-6.5
(quartz)
7
(calcite) 3
Location:
Specimen
Code: NBB 098
US $ 35
.
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