Hilgardite is a mineral with the chemical formula Ca₂B₅O₉Cl·H₂O. It is named after Eugene W. Hilgard. It is found in Germany and Louisiana. It is transparent and has vitreous luster. It is colorless, but leaves a white streak. It has a triclinic crystal system. It is rated 5 on the Mohs Scale. They are hemihedral.

[edit] External links

• mindat.org

This article about a specific mineral or mineraloid is a stub. You can help Wikipedia by expanding it. v • d • e