Pyrite and Calcite after Fluorite Pseudomorph Specimen - Dalnegorsk, Russia TD1608 byssolite Dimensions: 6 x 8 x

Dimensions: 6 x 8 x 3

Weight: 211 grams

Weight: 26

Blastoids persisted until their extinction at the end of Permian

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Pyrite and Calcite after Fluorite Pseudomorph Specimen - Dalnegorsk, Russia TD1608 byssolite Dimensions: 6 x 8 xPyrite 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