Formally described in 1978—a relatively new mineral. Found only along the Chara River basin in Siberia. Nowhere else on Earth.

Formed when alkaline granite meets limestone under high-pressure metamorphic conditions. This combination does not recur in any other known location, confining the source to a single point. Not rare by accident—isolated by geological inevitability.

Discovered during the Soviet era, though the government initially withheld its existence. When Western mineralogists first examined a sample during the Cold War, it matched nothing in the existing record. A stone that defied classification before it even had a name.