Green Tourmaline in Rock Crystal – NER 030

Measurements: 70 x 62 x 33 mm

Description:  Green tourmaline (elbaite) crystals in rock crystal. 

The longest tourmaline is 46 mm, but only the ends protrude from the rock crystal. 

The longest single tourmaline, which is on the surface and only covered by the rock crystal on a small section, is 30 mm long, and not terminated.

Weight of Specimen:  207.2 g

Chemical Composition:  SiO2  (quartz)                                                          Na(Li,Al)3Al6(BO3)3Si6O18(OH)4   (tourmaline)
                                     

Hardness on Mohs Scale:  (quartz)  7
                                        (tourmaline)  7 - 7.5
                                      

Location:  Karibib, Erongo Region, Namibia.

Specimen Code:  NER 030

US $ 80

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