This cabochon is part chrysoprase and part host rock with fantastic zoning. Chrysoprase is a polycrystalline chalcedony that owes its bright green colouring to nickel impurities.
With a hardness of 6, excellent toughness and good stability, chalcedony is suitable for use in rings, pendants, earrings, bracelets, brooches and cufflinks, although abrasion and wear may occur in rings and bracelets.
Hardness – resistance to scratching and wear
Stability – resistance to alteration by light, heat or chemicals
Toughness – resistance to fracture, cleavage or cracking
Please note you will receive the stone in the photograph