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Mineralpedia Details for Brewsterite-Sr

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Brewsterite-Sr

Brewsterite-Sr

Named for Scottish mineralogist Sir David Brewster, and for its strontium content. Brewsterite-Sr is a rare mineral that is deposited hydrothermally in druses lining cavities in basalt and schist, and can be found more rarely in ore deposits. Localities for Brewsterite-Sr include at the type locality at Stronitan in Scotland, France, Russia, and Canada, among only a couple others.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/brewsterite-(Sr).pdf

Formula
Sr(Al2Si6)O16ยท5H2
Crystal System
Monoclinic 
Crystal Habit
Prismatic 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
white, yellowish white, gray. 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
WebMineral
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Mindat
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Brewsterite-Sr from Whitesmith mine, Strontian, Scotland

Brewsterite-Sr
            from Whitesmith mine, Strontian, Scotland

White to colorless, short, stout, prismatic crystals to 1.5mm throughout matrix.

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Brewsterite-Sr from Middleshop, Strontian, Argyllshire, Scotland

Brewsterite-Sr
            from Middleshop, Strontian, Argyllshire, Scotland
Special Info
Type Locality

Exceptional specimen of Brewsterite with colorless, stubby, prismatic crystals to 2.5mm. Great coverage on front and back, loaded with crystals.

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