Phantom Quartz Natural 8mm Round - 15-16 Inch Ocean Agate It was originally named for

It was originally named for the visible inclusions of the mineral Cacoxenite

The name "heliodor" is derived from two Greek words: helios "sun

The stone's composition remains somewhat ambiguous

It also serves as the Mohs hardness scale index mineral for a hardness of 8

Selenite is a crystal formed from the mineral gypsum

Phantom Quartz Natural 8mm Round - 15-16 Inch Ocean Agate It was originally named forPhantom Quartz form over pre to existing crystals. The boundaries of the included crystals are visible and are known as phantoms. Phantom Quartz has the same chemical composition of other Quartz, silicon dioxide. This Phantom Quartz is gray, from translucent to opaque, with some transparent inclusions. It is believed to be a powerful meditation stone, helping users to get in touch with their true self.