Formula: PbSO₄

Species:

Colour: Colorless to white, often tinted grey, yellow, green or blue; colourless in transmitted light.

Lustre: Adamantine, Vitreous, Resinous

Hardness: 2½ – 3

Specific Gravity: 6.37 – 6.39

Crystal System: Orthorhombic

Member of: Baryte Group

Name: Named in 1832 by Francois Sulpice Beudant for the type locality, the Parys Mine on the Island of Anglesey (Ynys Môn) in Wales, U.K.

Type Locality: Parys Mountain Mines, Amlwch, Isle of Anglesey, Wales – UK

Isostructural with: Baryte, Celestine

Baryte Group. Along with cerussite, the most common secondary lead mineral.