villarsiten.
/vɪˈlɑːsʌɪt/ Mineralogy.
A hydrous silicate of magnesium occurring massive or in rounded grains at Traversella, Piedmont.
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the world > the earth > minerals > types of mineral > silicates > nesosilicates > [noun] > olivine group > others
forsterite1824
fayalite1844
villarsite1846
hortonolite1869
roepperite1872
1846 J. E. Worcester Universal Dict. Eng. Lang. (citing Dana).
1850 D. T. Ansted Elem. Course Geol. §429 Villarsite, silicate of magnesia with iron and manganese.
1855 D. T. Ansted et al. in Orr's Circle Sci.: Inorg. Nature 511 Villarsite,—Prismatic,..Translucent. Col[our], yellowish-green.
1889 A. Irving Metamorphism of Rock 55 Villarsite, which agrees with olivine in crystal form and optical characters, contains 4 to 6.2 per cent. of water.
This entry has not yet been fully updated (first published 1917; most recently modified version published online September 2021).
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