Chalcedony on Smoky Quartz “casts” after Laumontite Pyromorphite but in many instances will

but in many instances will surpass other Ferberites from Yaogangxian or Panasqueira for size and quality

A group of very well-formed

and if you’re a collector of Cassiterites or Bolivian minerals

Specimen # BULG4121

good sized

Chalcedony on Smoky Quartz “casts” after Laumontite Pyromorphite but in many instances willThis locality in the Cripple Creek District (purportedly in an old mine shaft) produced unique epimorphs or "casts" of Smoky Quartz and Chalcedony replacing Laumontite. The Smoky Quartz has a distinctive muted silvery grey color, with very little luster and a somewhat stalactite esque growth due to the way the Quartz overgrew the preexisting Laumontite. The lack of luster on the Quartz is most likely due to a micro coating of Chalcedony. The biggest