Fine-grade chrysoprase, rough and polished stones for healing and collectors.
Chrysoprase is a relatively rare variety of the mineral chalcedony.
Best known for its apple-green colour, the finest gemstones can be mistaken for emeralds.
The colour of chrysoprase, which comes from impurities of nickel, can vary depending on where it's mined.
Chrysoprase, like all types of chalcedony, has a microcrystalline structure. This means it's composed of crystals too small to be seen with the naked eye.
The crystals are typically fibrous and intergrown, giving the mineral a smooth, dense appearance.