Mineral Species: Gypsum 

Chemical Formula: CaSO4.2H20

Chemical Name: Hydrous Calcium Sulfate

Mineral Class: Sulfate

Mineral Notes: Gypsum is the commonest sulfate. It is a major rock forming mineral that forms massive beds, usually from precipitation out of highly saturated waters. Since it forms easily from saline water, gypsum may have many inclusions of other minerals and even trapped bubbles of air and water. Alabaster is a micrograined variety characterised by its greater hardness. This allows the mineral to be carved as has been done in various artworks.

Description: An intersting form of Alabaster Gypsum which has been weathered from a massive deposit and then 'carved' by running water. The mineral is an attractive orange-pink colour and has a pearly luster. Close inspection shows individual crystals which give the specimen a slightly abrasive feel. The hardness gives the specimen a peculiar 'ring' when struck gently with an implement. A good mineral curiosity specimen.

Location: Penarth, Glamorgan, Wales.