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Chrysoprase

Hardness (Mohs): 6.5–7
Chemical Formula: SiO2
Crystal System: Trigonal
Size: Specimen size varies; record the piece, not the species

Silicates

Chrysoprase is apple-green chalcedony, a microcrystalline variety of quartz colored by nickel. It is not a separate species from agate or carnelian.

This page is only for Chrysoprase. Comments below are for this material.