Formula: BaCa(CO₃)₂

Species:

Colour: Colourless, white, greyish, greenish, light yellow

Lustre: Vitreous, Resinous

Hardness: 4

Specific Gravity: 3.66 – 3.71

Crystal System: Monoclinic

Name: In allusion to the composition, containing BARium and CALCium

Type Locality: Blagill Mine, Alston Moor, Eden, Cumbria – England, UK

Polymorph of: Alstonite, Paralstonite