Thortveitite
Sc₂Si₂O₇
Silicates
Hardness —
· Monoclinic
Ca₄Mg₉Sb₃O₄[Si₆Be₃AlFe₂O₃₆]
Sapphirine supergroup, single chain inosilicate mineral
Named after Wilfred Reinhardt Welsh
Source: Wikidata
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