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16.40: Hematites

Última actualización

30 oct 2022
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- 16.39: Hauyne
- 16.41: Iolita

gemology
Gemology Project

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Hematita

Hematita
Composición química	Fe ₂ O ₃
Sistema de cristal	Trigonal
Hábito	Cristales tabulares a gruesos; micáceos o platosos, comúnmente en rosetas; masas radiantes fibrosas, reniformes, botrioidales o estalácticas, columnares; terrosos, granulares, oolíticos
Escote	Ninguno, puede mostrar separaciones en {0001} y {1011}
Fractura	Desigual a subconcoidal
Dureza	5.5—6.5
Índice de refracción	n _ω = 3.150—3.220, n _ε = 2.870—2.940
Gravedad específica	5.26
Lustre	Metálico

Hematita

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