Blue and Lavender Chalcedony Square Cabochon from Turkey

About Chalcedony

Chalcedony is a fine-grained, usually translucent form of quartz composed mainly of microscopic quartz crystals, often with a small proportion of the related mineral moganite. Its colours range from white, grey and pale blue to yellow, brown, pink and green; many trade varieties, including agate, carnelian and chrysoprase, are classified within the broader chalcedony group. A softly waxy lustre and gently diffused light give…