Pyrite and Calcite after Fluorite Pseudomorph Specimen - Dalnegorsk, Russia TD1608 byssolite The druzy quartz really sparkles

The druzy quartz really sparkles in the sunlight

Dimensions: 6 x 8 x 3

A third mass was discovered in 2004 weighing about 50 kg

Michigan's copper mines played a crucial role in supplying copper for the burgeoning industrialization of the United States and remain an important part of the state's history and economy

Blastoids persisted until their extinction at the end of Permian

Pyrite and Calcite after Fluorite Pseudomorph Specimen - Dalnegorsk, Russia TD1608 byssolite The druzy quartz really sparklesPyrite and Calcite after Fluorite Approx. Dimensions: 2. 5 x 2 x 1 inches Approx. Weight: 55 grams Locality: Nikolaevskiy Mine, Dalnegorsk, Primorskiy Kray, Russia Includes labeled acrylic base and cube as shown in photos. What a unique and wild specimen! Cubic fluorite dissolved away and was replaced by calcite and iridescent pyrite. The cubic structure of the fluorite was retained, but the mass of fluorite beneath was dissolved away so leave only a