Chrysoprase Slabs from Australia
These chrysoprase and lemon chrysoprase slabs come from a green apple variety of chalcedony. The color is caused by tiny inclusions of Ni-bearing layers silicates (willemseite, népouite or others) according to Mindat.org. Chrysoprase has a Mohs hardness of 6.5 to 7. Lemon chrysoprase is slightly softer, but will still take a great polish.
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