The only reported cut catapleiite is from Mte. Ste. Hilaire, Quebec, Canada, in the form of tiny colorless gems.
The International Gem Society (IGS) has a list of businesses offering gemstone appraisal services.
|Crystallography||Hexagonal; crystals thin hexagonal plates. Also lamellar masses; twinned. Gaidonnayite is orthorhombic.|
|Colors||Light yellow, yellowish brown, brown, salmon-pink, yellowish red. Rarely pale blue or colorless.|
|Luster||Vitreous, greasy, or dull.|
|Specific Gravity||2.65 – 2.8|
|Cleavage||Perfect 1 direction, imperfect 2 directions.|
|Stone Sizes||Gems under 1 carat have been cut from Canadian material.|
|Formula||Na2ZrSi3O9· 2H2O; Dimorphous with Gaidonnayite|
|Pleochroism||None in colorless gems.|
OPTICS: o= 1.596; e = 1.624
OCCURRENCE: Alkalic rocks and pegmatites.
Langesundfford District, Norway; Magnet Cove, Arkansas.
Greenland; USSR; Madagascar.
Mt. Ste. Hilaire, Quebec, Canada: cuttable crystals.
COMMENTS: The only reported cut catapleiite is from Mte. Ste. Hilaire, Quebec, Canada, in the form of tiny colorless gems.
NAME: From Greek words meaning rare minerals because catapleiite is usually associated with other rare minerals.