Color is usually colorless, tan or brown.
Luster is vitreous. Diaphaneity is translucent to opaque. Crystal Habits include aggregates of minute plates forming rosettes on crystals of taeniolite. Streak is greenish-white to white. Associated Minerals include albite, anatase, calcite, catapleiite, dolomite, fluorapatite, gmelinite, pyrite, quartz, rutile, siderite and sphalerite.