Hardness orders minerals by how well they resist scratching. Wikipedia notes that "quartz is the mineral defining the value of 7 on the Mohs scale of hardness," the reference scale geologists use to compare one mineral against another. Browsing by hardness groups minerals that scratch, or resist scratching, in the same way.
Facts
Comparison
Formation OriginElements that occur in nature as minerals in uncombined form. 1 Hardness
Connections
Sources
1. Wikipedia: Native element minerals
WikipediaLead sectionQuote, Lead section
Native element minerals are those elements that occur in nature in uncombined form with a distinct mineral structure.
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