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Silicon dioxide

Quartz in the East Region

  • No notable occurrences in database yet.

Quartz in the Front Range Region

Quartz in the Northwest Region

Quartz in the South Central Region

Quartz in the Southwest Region


A sparkling white cluster of drusy quartz casts after scalenohedral calcite crystals. This is one of a large lot collected by George Robertson in 1998. From the Ohio Mine in Ouray County. Measures 8 x 7 cm.
Photo courtesy of Dave Bunk Minerals.


Typical Black Cloud sulfide ore coated by quartz crystals to 1.5 cm with a secondary growth coating most of the plate. There are casts in the secondary overgrowth that look like possible casts of earlier dolomite crystals. From the Black Cloud Mine in Leadville. Measures 8 x 4 cm.
Photo courtesy of Dave Bunk Minerals.


Rhodochrosite and fluorite on quartz. From the Sweet Home Mine near Alma.
Photo courtesy of ARCH Minerals.

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