Hyalite Opal on Quartz Matrix – NER 010

Measurements:  60 x 38 x 24 mm

Description:  A small druse (27x 17mm) of hyalite opal on a quartz matrix. The gemmy, jelly-like, light green opal fluoresces bright green, which adds furthermore to the aesthetics of the specimen. There are a few small smoky quartz crystals attached to the bottom of the matrix.

Chemical Composition:   SiO₂•1.5(H₂O)  (opal)  
                                    SiO₂  (quartz)                                                                 
Hardness on Mohs Scale:  (opal)  5.5-6     
                                      (quartz)  7      
                                              
Location:  Erongo Mountains, Erongo Region, Namibia.