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Measurements: 54 x 46 x 22 mm Description: A group of quartz crystals with touches of smoky colouring, small moving bubbles, negative crystal growth and strange growth marks. The
specimen has only a few small nicks. Chemical Composition: SiO2 Hardness on Mohs Scale: 7 Location: Brandberg, Namibia. Specimen Code: NBB 101 US $ 25 ..
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