quartz

Visualized: Over 100 Minerals and Gems Ranked by Hardness

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Editor’s NoteThis article explains the Mohs hardness scale, a fundamental geological tool developed in 1812 to rank minerals by scratch resistance….

【Quebec, Cana】Hidden Treasures: The Precious and Semi-Precious Stones of Quebec

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Editor’s NoteThis article explores the fascinating geological and historical origins behind the phrase “As false as a Canadian diamond,” tracing it…