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 OriginInclude the sulfate ion (SO4 2-) within their structure. 1 Hardness
Connections
Sources
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.
Reader Challenges (0)
No disputes yet. Spotted an error or a better source? Open the first one.
Sign in to dispute this or suggest a correction.