- Summitville District (Summit District), Rio Grande Co., Colorado, USA
- Thumbnail, 2.7 x 2.5 x 1.9 cm
Summitville, Colorado covellite of this quality is rarer than Butte covellite and is considered by many to be the finest covellite in the world. This superb thumbnail specimen features very rare, discrete plates of iridescent, peacock-blue covellite crystals richly and aesthetically set on matrix. Ex. Don Boydston Collection.