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Fluorrichterite Pictures

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  Fluorrichterite (formerly Fluororhicterite) in calcite from Wilberforce, Ontario, Canada.

CHEMISTRY  Na₂Ca(Mg,Fe)₅Si₁₈O₂₂(F,OH)₂

CRYSTALLOGRAPHY  Monoclinic

CRYSTAL GROWTH AND HABITS  Fluorrichterite most commonly forms prismatic crystals with a nearly diamond shaped cross section.

COLOR AND OTHER OPTICAL PROPERTIES  The color of fluorrichterite is commonly a very dark shade of brownish black with an occasional hint of blue or green.  

HARDNESS 6

SPECIFIC GRAVITY   about 3      

LUSTER  Vitreous

STREAK  White

BREAKABILITY    Fluorrichterite has two poorly developed cleavages at angles of 120^o and 60^o.

OCCURRENCE   Currently the only occurrence of Fluorrichterite is in a skarn near Wilberforce, Ontario, Canada.

ASSOCIATED MINERALS Calcite, Phlogophite, Biotite, Cancrinite

MINERAL NAME  - Named after the mineral Richterite (which has no fluorine).