Mineral 1.0Test your knowledge of specific minerals

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(c) Mineral Picture courtesy of www.yuprocks.com
Mineral Picture courtesy of www.yuprocks.com

Quartz (crystal)SiO2

Class: Silicate
Subclass: Framework
Hardness: 7
Density: 2.7
Lustre: Vitreous / glassy
Habit: Crystalline
Colours: Clear transparent

  Crystal System: Hexagonal
Cleavage: None
Fracture: Conchoidal
Magnetism: None
Reaction with HCl: None

Identification in hand sample:
Hardness, translucency and colour are indicators.

  

Inaccurate data? Better photos? .