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16.56: Prehnita

Última actualización

30 oct 2022
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- 16.55: Pouretteita
- 16.57: Pirita

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Prehnita
Composición química	Ca ₂ Al ₂ Si ₃ O ₁₀ (OH) ₂ +Fe
Sistema de cristal	Ortorrómbico
Hábito	Generalmente agregado fibroso
Escote	Buena dirección: 1
Fractura	Uneven-Concoidal
Dureza	6-6.5
Naturaleza óptica	Agregado biaxial (+)
Índice de refracción	1.649-1.616
Birrefringencia	.020-0.031
Gravedad específica	2.90
Lustre	Vítreo-nacarado

Archivo:Prehnite2.jpg

Figura $\PageIndex{1}$ : Cabujón Prehnite
Foto cortesía de Barbra Voltaire

Archivo:Prehnite1.jpg

Figura $\PageIndex{2}$ : Cristales de Prehnita
Foto cortesía de Barbra Voltaire

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