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Origin of sphene
Words nearby sphene
Example sentences from the Web for sphene
The iron oxides, originally ilmenite, are usually altered to sphene.
These rocks contain also iron oxides (usually titaniferous), apatite, sometimes sphene, augite and olivine.
Most gem-stones are harder than quartz, though precious opal, turquoise, moonstone and sphene are inferior to it in hardness.
Reddish grains of sphene or of garnet are occasionally visible.
The rarer stones, sphene and epidote, likewise exhibit this property markedly.A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public|Frank Bertram Wade