Very Interesting Schorl and Quartz Specimen - NERS 022

Very interesting schorl and quartz specimen with other minerals


Measurements:  65 x 45 x 28 mm

Description:  A schorl crystal (variety foitite, 56 mm long) together with a small schorl crystal, sit on a quartz matrix with quartz crystals and thin schorl needles in and on the surfaces.

There are a few very small, clear crystals (to us, unkown) on some surfaces, as well as bits of feldspar with a yellowish (to us, unknown) mineral, and bits of hyalite opal.

The schorl crystal has bits of damage to the multiple (flake-like) terminations, while one quartz crystal has a small nick to its termination.

This very interesting specimen with five different minerals, displays well on a flat surface.

Weight of Specimen:  90.1 g

Chemical Composition:   SiO2  (quartz)  
                                        NaFe2+3Al6Si6O18(BO3)3(OH)4  (schorl)
                                        KAlSi3O8  (feldspar) 
                                        SiO2•1.5(H2O)  (opal)  

Hardness on Mohs Scale:  (quartz)  7
                                          (schorl)  7.5
                                          (feldspar)  6 - 6.5                                                                               (opal)  5.5-6

Location:  Erongo Mountains, Erongo Region, Namibia.

Specimen Code:  NERS 022

US $ 110


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