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Jasper Chalcedony

Jasper is really a massive, fine-grained, opaque number of chalcedony, thought to force away sight defects and drought. It happens in shades of brown, greyish blue, red, yellow, and green and mixtures of those. “Orbicular” jasper has white or grey, eye-shaped patterns encompassed by red jasper. “Riband” jasper is striped and utilized in carvings, cameos, and intaglios, which showcase its layered structure. Hornstone is really a grey variety.
Red jasper happens in India and Venezuela; various colours occur in the united states, especially orbicular jasper in California; red and green riband jasper happens in Russia. Additionally, it happens in France and Germany.

Properties
Chemical Composition: 
Silicon dioxide
Crystal System / Forms: 
Trigonal
Hardness: 
7
Specific Gravity: 
2.61
Lustre: 
Vitreous
Refractive Index / Birefringence: 
1.53-1.54 / 0.004
Cuts & Uses: 
Cameo, Polished.
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