Origin: Brazil

Description: Optical quartz is very clear and transparent. What defines it is how "clean" it is. This means there are workable areas with no inclusions or flaws. These stones are essentially high quality quartz chunks with very good clarity, but no specimen value- so they are used for cutting.

Chemical Composition: SiO2

Grade: Semi Precious
Appearance: Transparent
Inclusions: Almost none. some rocks may have areas of fogginess, but a large section will be transparent and clean.

Cost per Gram: $0.30
Approximate Size of 1 pc: 4cm x 5cm x 3cm
Approximate Weight of 1 pc: 50-100g

Rough is rough. We do our best to grade and describe pieces in the lot, but ultimately, they all differ.