Schorl Cluster – NERS 023

Schorl crystal cluster with bits of feldspar and a yellowish mineral

Measurements:  71 x 66 x 34 mm

Description:  A cluster of schorl crystals with bits of feldspar on them. The yellowish mineral that coats parts of the specimen, is unknown to us.

Some of the smaller schorl crystals have broken off, while some of the termintions have nicks. Despite this bit of damage, it remains a nice specimen, and displays well on a flat surface.

Weight of Specimen:  165.7 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 Region, Namibia.

Specimen Code:  NERS 023

US $ 65








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