Quartz

Roman Kanich·July 17, 2022·0 comments

Quartz
Clades: Quartzes.
Chemical: SiO2.
Colour: colorless, purple, rose, red, black, yellow, brown, green, blue, orange, etc.
Lustre: vitreous.
Hardness: 7.
Specific Gravity: 2.65 to 2.66.
Crystal System: Trigonal.