Minerals identify

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Sekaninaite

Cyclosilicate

Sekaninaite ((Fe+2,Mg)2Al4Si5O18) is a silicate mineral , the iron-rich analogue of cordierite.

It was first described in 1968 for an occurrence in Dolní Bory, Vysočina Region, Moravia , and is now known also from Ireland, Japan, and Sweden. It was named after a Czech mineralogist (1901–1986). In Brockley on Rathlin Island sekaninaite occurs in bauxitic clay within the contact aureole

Identification

Color of mineral

Blue
Violet

Mohs scale ( mineral hardness )

7

Density ( specific gravity )

1.561
1.572
1.576

Luster ( interacts light )

Vitreous

Crystal ( diaphaneity )

Orthorhombic