Gemmy Quartz Crystals and Calcite on Basalt Matrix - NBB 007

Clear, Gemmy Quartz Crystals and Calcite on Basalt Matrixmibia

Measurements:  68 x 51 x 38 mm

Description:  Clear, gemmy quartz crystals with calcite and analcime (?) on a basalt matrix.

Some of the quartz crystals (largest about 18 mm long) have a few hematite specks. 

This specimen looks much better in real life, than on these photographs!

Some of the lesser quartz crystals have some damage.

Weight of Specimen:  92.8 g  

Chemical Composition:  SiO2  (quartz)
                                       CaCO3  (calcite)
                                       NaAl(Si2O6)•(H2O)  (analcime) 

Hardness on Mohs Scale:  (quartz)  7  
                                          (calcite)  3
                                          (analcime) 5       

Location:  Brandberg, Namibia.

Specimen Code:  NBB 007

US $ 120

  

                                 
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