'Citrine' Quartz Crystals on Matrix OTH 002

'Citrine' quartz crystals with inclusions, on matrix

Measurements:  90 x 58 x 40 mm

Description:  Citrine quartz crystals with inclusions, that could be hematite, sit on a quartz / 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 specimen has a few nicks. It displays well on a flat surface, all-round. The base of the matrix has been trimmed. 

Weight of Specimen:  172 g

Chemical Composition:  SiO2

Hardness on Mohs Scale:  

Location:  Minas Gerais, Brazil.

Specimen Code:  OTH 002

R 400

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