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CHAPTER XXXII.
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SPHENE.
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ΡΗΕΝΕ
is a mineral which has occasionally been cut as an ornamental stone.
Its appearance is somewhat between that of Opal and Chrysolite. In
colour it varies from pale yellow to green ; and it exhibits all
degrees of transparency, some varieties being, however, opaque. Only
the most transparent and clear specimens have the claim to be classed
as gem-stones ; and although the mineral has a remarkably brilliant
dispersive power, its softness is against its ever being extensively
used. Among its many localities mention may be made of Arendal, in
Norway, of St. Gothard and Mont Elanc, and many parts of North America.
SPHENE.
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