Kyanite – Natural, Faceted, Blue

Since kyanite can vary significantly in hardness (from 4 to 7.5) even in individual crystals, cutting this material proves quite a challenge. This makes faceted kyanite, like the one pictured here from Nepal, very rare. Photo by Didier Descouens. Licensed under CC By-SA 4.0.

Article: Gemstone Faceting Terms: A Glossary for Students

Credit: Didier Descouens