Heulandite-Ca, Mordenite
Rat's Nest claim, Challis, Bay Horse Mining District, Custer County, Idaho, USA
6.3 x 6.2 x 4.2 cm. The piece comes from an old East Coast collection, and probably came out at least 25 years ago (~1991). These are some of the most classic zeolite specimens from the United States, especially outside of the East Coast. Sharp, very lustrous, well-formed, peach colored groups of heulandite measuring up to 3.3 cm sit aesthetically ...
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