Catapleiite

Content sourced from Wikipedia, licensed under CC BY-SA 3.0.

Catapleiite (Na2ZrSi3O9·2H2O) is a rare mineral that is a dimorph of gaidonnayite and is usually found with other minerals. The name comes from Greek words meaning "with more." Pure catapleiite is colorless, but it commonly appears as tan, brownish-red, light yellow, dark brown, flesh red, or orangish. It crystallizes in the monoclinic system and has a hardness of about 5.5–6 on the Mohs scale. Its luster ranges from vitreous to dull, and its specific gravity is about 2.65–2.90. Catapleiite is found in several locations, including the Poudrette quarry near Mont Saint-Hilaire in Quebec, Canada, and Låven Island in Norway.