Strontianite

Formula: SrCO3; Often contains minor Ca substituting for Sr.

Colour: Colourless, white, gray, light yellow, green, brown; colourless in transmitted light

Lustre: Vitreous, Resinous

Hardness:

Specific Gravity: 3.74 – 3.78

Crystal System: Orthorhombic

Member of: Aragonite Group

Name: Named in 1791 by Friedrich Gabriel Sulzer after its discovery locality, Strontian, Scotland.

b Strontian, Fort William and Ardnamurchan, Highland – Scotland, UK

The Sr analogue of aragonite and witherite.  Strontianite, strontium carbonate, is mainly found as a low-temperature mineral in limestone and also found as a gangue mineral in sulphide veins. It is almost always fluorescent.