Wheal Hazard, Botallack Mine, Botallack, St Just, St Just District, Cornwall, England, UK

(Ca,Na,K)_2-3Al₃(Al,Si)₂Si₁₃O₃₆

Specimens of this material from this mine were formerly labeled as Heulandite. The Clinoptilopite consists of small crystals covering the specimen with habits which range from blocky to platey. The color ranges from clear to a pale yellow to a fairly bright orange. Some of the orange color appears to be from another, unidentified material. The specimen is in very good condition.

9.2 x 5.4 x 2.6 cm

Sold Specimen retained as part of the Minerals Sold But Not Forgotten Galleries