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.
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Formation OriginInclude the sulfate ion (SO4 2-) within their structure. 1 Mineral
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1. Wikipedia: Sulfate minerals
WikipediaLead sectionQuote, Lead section
The sulfate minerals are a class of minerals that include the sulfate ion (SO2-4) within their structure.
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