Schorl Crystal Group with Feldspar – NAM 013

Measurements:   125 x 115 x 75 mm

Description:  A schorl crystal group (variety foitite) with prolific feldspar sprinkling. When viewed in light, the specimen shows lovely, shiny facets among the feldspar (difficult to see in images).

The specimen, which has only a few small nicks, displays well on a flat surface, all-round.

Weight of Specimen:  958 g

Chemical Composition:  NaFe²⁺₃Al₆Si₆O₁₈(BO₃)₃(OH)₄  (schorl)
                                       KAlSi₃O₈  (feldspar)                             

Hardness on Mohs Scale:  (schorl)  7.5
                                          (feldspar)  6 - 6.5

Location:  Erongo Mountains, Erongo Region, Namibia.

Specimen Code:  NAM 013