Benitoite

Benitoite is a mineral containing barium and titanium. It has a similar appearance to sapphire but is much softer.

Benitoite is named for the San Benito River. It is the official state gem of California.

Benitoite was the first discovered example of the ditrigonal dipyramidal crystal class.

 Sources 

Category:Titanium minerals
Category:Cyclosilicates