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RM3790   Microcline and Opal-AN
K(AlSi₃O₈)
  -  9. Silicates
#3168
Erongo Mts., Erongo, Namibia

A curious specimen composed of prismatic microcline crystals, some interpenetrated, and with parallel growth. They are partially coated by globular aggregates of opal, which fluoresce strongly under SW ultraviolet light.

Size: 8.6 x 4.5 x 4 cm.
Main crystal: 9.5 x 4.3 x 3 cm.
Fluorescent under long wave UV
More info
120 €
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