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Measurements:
69 x 57 x 38
mm Description: Two aggregates of prehnite crystals share a geode cavity with calcite and quartz crystals. The matrix is basalt, and has been trimmed. The larger prehnite
aggregate has no damage, while the smaller one has a small contact
mark. The only other notable damage is to the edges of the
geode. Weight of
Specimen: 207.5
g Chemical
Composition: Ca2Al2Si3O10(OH)2
(prehnite) Hardness
on
Mohs Scale: (prehnite)
6-6.5
Location: Specimen Code: NBB 133 US $ 75 . .
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