Paracelsian

minerals

tectosilicate

feldspar

metamorphic

Formula: Ba(Al₂Si₂O₈)
Tectosilicate (framework silicate), feldspar group, monoclinic paramorph of celsian, which is also monoclinic, and hexagonal hexacelsian
Crystal System: Monoclinic
Specific gravity: 3.29 to 3.32
Hardness: 5½ to 6
Streak: White
Colour: Colourless, white, pale yellow
Common impurities: Fe,Mg,Ca,Na,K,H₂O
Environments:

Metamorphic environments

At Candoglia, Italy paracelsian occurs as pale yellow granules in schist (Dana).
At the Benallt mine, Wales, UK, paracelsian is found in celsian in a band in shale and sandstone associated with a metamorphosed manganese deposit (Dana, HOM).

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