Transparency crystals are transparent to translucent. Cleavage is perfect in one direction producing thin sheets or flakes. Fracture is not readily observed due to cleavage but is uneven. Hardness is 2 - 3. Streak is white.
Specimens are fluorecent lemon yellow under shortwave UV light.
Associated Minerals are many and include catapleiite , ilmenite , behoite , titanite , aragonite , eudialyte , leucosphenite , fluorite , willemite , apophyllite , rhodochrosite , steacyite , leifite , sodalite , pyrochlore , calcite , sugilite , microcline , axinite , manganbabingtonite , galena , ancylite , natrolite , serandite , hilairite , sheldrickite and calcioancylite . Best Field Indicators are crystal habit, fluorescence, color, cleavage, locality and associations.