Kind sorts earth materials into their broadest category, such as mineral, rock or sediment. Wikipedia describes quartz as "a hard mineral composed of silica (silicon dioxide)," placing it firmly in the mineral kind rather than among rocks made of many minerals together. This dimension gives a visitor the widest possible grouping of what a material actually is.
Facts
Comparison
Formation OriginSulfide (S2-) or disulfide (S2-2) as the major anion. 1 Mineral
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1. Wikipedia: Sulfide minerals
WikipediaSulfide minerals, lead sectionQuote, Sulfide minerals, lead section
The sulfide minerals are a class of minerals containing sulfide (S2-) or disulfide (S2-2) as the major anion.
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