Gemstones 250x250

Glossary of Terms

Staurolite twin

Form of penetration twinning where two monoclinic crystals form interpenetrating twins at 90º, forming a cross. Named after the mineral Staurolite, which most frequently exhibits this form of twinning. (Staurolite crystals may also twin at angles other than 90º, such as 60º.)

Staurolite Twin

© www.johnbetts-fineminerals.com - All Rights Reserved.


Copyright © 2019. Minerals.net

View on Full Site