Smoky Quartz Crystal Group with Cassiterite – NAM 005

Measurements:  83 x 47 x 37 mm

Description:  A group of smoky quartz crystals with small cassiterite crystals on some faces, as well as small bits of hyalite opal, which should fluoresce under ultraviolet light. 

The termination point has a nick.

Weight of Specimen:  105.8 g

Chemical Composition:  SiO₂ (quartz)
                                        SnO₂ (cassiterite) 
                                        SiO₂•1.5(H₂O) (basic opal)  

Hardness on Mohs Scale:  (quartz) 7
                                           (cassiterite) 6-7
                                           (basic opal) 5.5 - 6

Specimen Code:  NAM 005

R 320

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