Mineralogy. Any of a class of minerals resembling gems, but less hard and more readily fusible, and useful as fluxes in smelting. Obsolete.
| 单词 | θ7262 |
| 释义 | the world > the earth > minerals > types of mineral > [noun] > other general types (8) fluor1610 Mineralogy. Any of a class of minerals resembling gems, but less hard and more readily fusible, and useful as fluxes in smelting. Obsolete. sulphur1799 Applied popularly to minerals containing sulphur or supposed to be sulphurous. amygdule1877 (See quot.) heavy mineral1893 (see quot. 1971). fem1902 One of two primary categories of igneous rocks classified quantitatively by their chemical composition: see femic, adj. Contrasted with sal (sal, n.4… sal1902 One of the two primary categories erected by Cross, Iddings, Pirsson, and Washington to classify igneous rocks and their characteristic minerals… stress mineral1913 a mineral whose formation in metamorphic rocks is believed to be dependent on shear stress. opaque1960 Mineralogy. A mineral that appears black in thin section when viewed in polarized light. |
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