Chalcedony Gemstone Guide

Chalcedony Gemstone

Chalcedony is a form of silica composed of the minerals quartz and moganite. There are many varieties of chalcedony including; agate and onyx.

Chalcedony occurs in many different forms, colours and patterns. White, grey or light blue are the most common colours found under the name of chalcedony used in jewellery. Chalcedony can be translucent to opaque, and usually has a waxy sheen. It is polished and used to make beautiful jewellery.


White chalcedony is often dyed light blue to resemble the naturally occuring blue chalcedony that is often a popular choice for jewellery.

Sourcing chalcedony

Chalecedony is found worlwide often in sedimentary or volcanic environments. Sources for chalcedony include, Uraguway, India, Madagascar, Mexico and Brazil.

Caring for chalcedony

Chalecedony is a durable and hard gemstone, however you should store your chalecedony jewellery separately, in a soft pouch, to avoid it damaging or scratching other jewellery. Chalcedony can be washed with a warm soapy water, but ensure you remove any soapy residue and where possible avoid extreme temperatures and direct sunlight to avoid discolouration.

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