Cluster of Quartz, Prehnite, Analcime and Epidote Crystals on Matrix - NBB 182

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

Measurements:  47 x 37 x 26 mm

Description:  Clear quartz crystals, a few with red hematite specks, share a conglomerate matrix of basalt, quartz and epidote, with light green prehnite and epidote crystals. Some of the quartz and prehnite crystals have a few small, glass clear (?)analcime crtstals on them

Some of the quartz crystals have small to minute nicks, and there is some damage to the edges.

Weight of Specimen:  49.8 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 182

US $ 150

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