Chalcedony is a cryptocrystalline form of silica and generally has a waxy lustre. It may be semitransparent or translucent. Its colour is usually white to grey, greyish-blue, or a shade of brown ranging from pale to nearly black.
It is a highly sought-after precious gem which for centuries has been used in the creation and encrustation of jewelry and everyday items.
Its chemical composition is Si02.
Carvings incorporate the outer natural rock of chalcedony and have been ahnd carved for centuries in asia