Hydrous silicate of iron and manganese, usually of a red-brown, greyish, or black colour.
| 单词 | θ6820 |
| 释义 | the world > the earth > minerals > types of mineral > silicates > nesosilicates > [noun] > olivine group > tephroite (3) knebelite1818 Hydrous silicate of iron and manganese, usually of a red-brown, greyish, or black colour. tephroite1868 A silicate of manganese, occurring in crystalline masses of an ashy grey or reddish colour. ganomalite1878 A silicate of lead and manganese, resembling tephroite, but with high lustre. |
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