PreviousNext HEU2343 - HEULANDITE-Ca on MORDENITE $40.00 Locality Rats Nest Claim, near Challis; Custer County, Idaho, USA Dimensions 97mm x 89mm x 64mm Translucent pearlescent cluster of light pink tapered heulandite crystals to 13 mm in height, on a white mordenite matrix. From John Cornish’s claim, which produces North America’s finest heulandites. No damage.