Chalcedony on Smoky Quartz “casts” after Laumontite Pyromorphite the Opals themselves are colorless

the Opals themselves are colorless

The fact that there are mines on this mountain is incredible considering the elevation and treacherous conditions

tree-like formation

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

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

Chalcedony on Smoky Quartz “casts” after Laumontite Pyromorphite the Opals themselves are colorlessThis 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