Color is brown, reddish brown, yellow and light to dark green. Luster is vitreous to dull. Crystals are generally translucent, but some specimens are translucent. Also found granular, massive and occasionally in radial aggregates. Cleavage is imperfect in two directions at 56 and 124 degrees.
Fracture is uneven.
Hardness is 5 - 6. Streak is brown. Large crystals have an almost striated or grainy appearance. Associated Minerals are quartz , feldspars , aegirine , arfvedsonite , diopside , pectolite , phlogopite , chromite , Iron-nickel , roedderite , kosmochlor , krinovite , tainiolite , calcite , fluorite , svabite , sodalite and eudialyte .