Nepheline
specimen number:
2354215
location:
Jebel Bou-Agrao, High Atlas Mts., Morocco
description: Located in the High Atlas Mountains of Morocco, Jebel Bou-Agrao is an alkaline igneous and volcanic complex characterized by rift-related magmatism that emplaced silica-undersaturated rocks within sedimentary strata. The area has a rich history of geological exploration and mineral collecting by researchers and enthusiasts seeking rare alkaline species. It is particularly renowned for producing exceptional specimens of nepheline, an anhydrous sodium potassium aluminum silicate mineral that crystallizes in silica-deficient alkaline environments like nepheline syenites and volcanic cavities, yielding well-formed hexagonal prismatic crystals prized by mineral collectors.
Choice white opaque non-lustrous blocky crystals of nepheline to 1.4 cm in size across the top of matrix. In good condition, excellent example for the species.
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