More than a stone, chalcedony encompasses non-translucent quartzes: agate, cornelian, jasper, onyx, etc. Common chalcedony is readily used in fine jewelry for its characteristic color ranging from blue to milky white. In its natural state, this ornamental stone does not have any banding.

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Already popular in Antiquity, the Middle Ages, and the Renaissance, chalcedony is used to compose appealing necklaces or earrings. It is used in the creation of rings of improbable dimensions.

Sourced from deposits located in Brazil, India, and Madagascar, chalcedony presents a hardness of 6.5 to 7 on the Mohs scale.