'Citrine' Quartz Crystals on Matrix OTH 015

Citrine quartz crystals on rock matrix

Measurements:  66 x 55 x 20 mm

Description:  Citrine quartz crystals sit on a thin basalt matrix. 

The crystals were originally amethyst, but the specimen was then baked at a high temperature (roughly 400 degrees C) for about half a day, which turned the colour to citrine.  

The only notable damage is to the edges of the specimen. The matrix has been stabilized with cyanoacrylate glue.

Weight of Specimen:  85.8 g

Chemical Composition:  SiO(quartz)

Hardness on Mohs Scale:  (quartz) 7

Location:  Minas Gerais, Brazil.

Specimen Code:  OTH 015

R 200





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