Fluorite, Albite and Herderite - NERF 032

Fluorite crystals with albite and unknown mineral



Measurements:  76 x 53 x 40 mm

Description:
 A specimen consisting of mostly light green fluorite crystals, partially coated with albite (and possibly feldspar) and with a few small, yellowish herderite crystals up to about 1 mm long. Herderite is seldom found in the Erongo region.

Some of the fluorite crystals have small nicks.

Total Weight of Specimens:  164.6 g 

Chemical Composition:   CaF2  (fluorite)
                                        NaAlSi3O8  (albite)  6 - 6.5
                                        CaBePO4F   (herderite)  5 - 5

Hardness on Mohs Scale:  (fluorite)  4
                                            NaAlSi3O8  (albite)  6 - 6.5
                                            CaBePO4F   (herderite)  5 - 5

Location:  Erongo Region, Namibia.

Specimen Code:  NERF 032

US $ 75

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