Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, QUARTZ, and tridymite. The compound is insoluble in water or acids except ...
Pneumoconiosis due to the inhalation of dust of stone, sand, or flint containing silicon dioxide, with formation of generalized, nodular fibrotic changes in both lungs. ...
Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, QUARTZ, and tridymite. The compound is insoluble in water or acids except ...
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