Blue Chalcedony (Marbled) 10mm Round 15-16 Inch Slab Selenite is a crystal formed

Selenite is a crystal formed from the mineral gypsum

its oldest known use being in Egypt more than five thousand years ago

Blue Lace Agate is a naturally occurring soft blue agate

It was named from the Latin "Thule" - which was a term used by ancient Greeks and Romans to refer to the then-little-known lands to the north or present day Scandinavia

This item is treated and dyed agate

Blue Chalcedony (Marbled) 10mm Round 15-16 Inch Slab Selenite is a crystal formedBlue Chalcedony is a naturally occurring soft blue translucent stone. It is a member of the Quartz family, a form of silica with a cryptocrystalline structure that incorporates Moganite along with the Quartz. Known in antiquity as the Speakers Stone, it is believed to have been worn Cicero, the great Roman orator. These strands were cut into beads with some of the material the Chalcedony was mined out of remaining, creating a unique "marbled" look.