Measurements: 60 x 50 x 25 mm Description: Sparkling quartz crystals on a feldspar and mica matrix.
The only notable damage is a contact mark.
Weight of Specimen: 46 g
Chemical Composition: SiO2 (quartz) KAlSi3O8 (feldspar) KAl2(Si3Al)O10(OH,F)2 (mica)
Hardness on Mohs Scale: (quartz) 7 (feldspar) 6 - 6.5 (mica) 2 - 2.5
Specimen Code: OTH 005
R 250