Color ranges from light beige to yellow, light yellow-brown and bronze to silvery.
Luster is vitreous. Fracture is uneven to splintery. Hardness is 3 - 4. Associated Minerals include aegirine, albite, analcime, calcio-ancylite, calcite, catapleiite, epididymite, fluorite, genthelvite, kupletskite, microcline, natrolite, pyrochlore, rhodochrosite and wurtzite. Distinguishing Features the crystal habit, color and pleochroism.