Cluster of Quartz, Prehnite, Analcime and Epidote Crystals on Matrix - NBB 183

Cluster of Quartz, Prehnite, Analcime and Epidote Crystals on Basalt Matrix


Measurements:  64 x 46 x 32 mm

Description:  A cluster of gemmy, clear quartz crystals (up to about 12 mm long), together with light green prehnite crystals (up to about 5 mm wide) and very small aggregates of gemmy, green epidote, all with a delicate sprinkling of hundreds of minute, glass clear analcime crystals, sit on a matrix of basalt rock. 

This amazing arrangement of minerals is from a very recent find. Damage is absolutely minimal.

Weight of Specimen:  70.1 g

Chemical Composition:   SiO2  (quartz)
                                      Ca2Al2Si3O10(OH)2  (prehnite)  
                                      NaAl(Si2O6)•(H2O)  (analcime)                                                              Ca2Fe3+2.25Al0.75(SiO4)3(OH)  (epidote)       

Hardness on Mohs Scale:  (quartz)  7      
                                          (prehnite)  6-6.5                             
                                                    (analcime) 5                                                                                        (epidote)  7    

Location:  Brandberg, Namibia.

Specimen Code:  NBB 183

US $ 450

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