A blue or purple banded variety of fluorite found in Derbyshire, often used for ornaments.
| 单词 | θ6697 |
| 释义 | the world > the earth > minerals > types of mineral > halides > [noun] > fluorite group > others (6) Blue John1768 A blue or purple banded variety of fluorite found in Derbyshire, often used for ornaments. tachhydrite1866 a chloride of calcium and magnesium found at Stassfurt in Prussian Saxony. carnallite1876 A hydrous chloride of potassium and magnesium, an important source of potash, occurring as a milk-white mineral (but often reddish from admixture of… nocerite1882 A mineral originally regarded as an oxyfluoride of calcium and magnesium, but later recognized as identical with the mineral fluoborite… terlinguaite1900 An oxychloride of mercury, Hg2OCl, found as transparent or translucent yellow or greenish yellow monoclinic crystals (see also quot. 1900). jarlite1933 A colourless to greyish-white fluoride of sodium, strontium, and aluminium, NaSr3Al3F16, found as monoclinic crystals at Ivigtut, Greenland. |
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