Chrome Chalcedony

This material is a silicified rock only found on top of the ground in Australia, the reason for being extremely rare. The chalcedony is a beautiful mottled emerald green with inclusions. The matrix also takes on the chrome chalcedony color. I’ve been told that this material can also be faceted.

Chrome chalcedony has been found in a number of places in Western Australia, these came from near the town of Newman which is approximately 700 miles north of the capital, Perth.

The geological setting of the area is that of an ultramafic intrusion into granite-greenstone of Archaean age. The intrusion consists of serpentinite that has also produced chrysoprase, chalcedony & common opal. These rock types along with the chrome chalcedony occur in the weathered , silicified cap rock. It’s believed that original weathered serpentinite has been replaced through processes of silica deposition and the chrome chalcedony represents a whole-rock replacement or psuedomorph.

Chromium which is responsible for the green colouration of the chalcedony has originated from the existence of chromite within the serpentinite.

If your bezel setting translucent cabs click this to read my Blog tip on how to set this type of stone.

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