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Glossary of watchmaking

Hematite

Hématite | ヘマタイト | 赤铁矿

Hematite

A natural iron oxide that is a metallic dark to silver-grey with a high sheen. Hematite can be used to make watch dials. It has a specific gravity of 4.95 to 5.16 and a hardness of 6.5 on the Mohs scale.