Hyalite Opal on Quartz – NER 032

Description:  A generous coating of beautiful botryoidal hyalite opal on a smoky quartz crystal. The hyalite opal fluoresces well under ultraviolet light.

The hyalite opal has a few nicks, while the smoky quartz crystal has a few natural pressure marks.

Weight of Specimen:  16.5 g  

Chemical Composition:  SiO₂  (quartz)
                                       SiO₂•1.5(H₂O)  (opal)   
                                      
Hardness on Mohs Scale:  (quartz)  7  
                                          (opal)  5.5-6    

Location:  Karibib, Erongo Region, Namibia. 

Specimen Code:  NER 032