Dolomite after Calcite with Quartz
Availability: 1 in stock
A VERY cool specimen of cogswheel shaped calcites pseudomorphed to dolomite and then nearly completely coated with a thin layer of quartz crystals. Terrific for a Mexican or pseudomorph suite.
Locality: San Vincente Mine, Guanajuato Mexico
Composition: calcium magnesium carbonate coated by silicon dioxide