Minerals identify

Know how to recognize them

Pentagonite

Silicate mineral

Pentagonite is a rare silicate mineral with formula Ca(VO)Si4O10·4(H2O). It was named for the unusual twinning which produces an apparent five-fold symmetry. It is a dimorph.

Pentagonite was first described in 1973 for an occurrence in Lake Owyhee State Park It has also been reported from the Pune district of India. It occurs as fracture and cavity fillings in tuff , heulandite , apophyllite

Identification

Color of mineral

Green
Blue

Mohs scale ( mineral hardness )

3

Density ( specific gravity )

1.533
1.544
1.547

Luster ( interacts light )

Vitreous

Crystal ( diaphaneity )

Orthorhombic