The chemistry of narsarsukite may include yttrium, calcium and potassium, but they are not usually significant enough to include in the general formula. Color is various shades of yellow, green, pink and brown as well as colorless. Luster is vitreous or adamantine to dull or greasy. Crystal System is tetragonal. Crystal Habits include tabular and prismatic crystals often arranged into sprays and parallel aggregates.
Fracture is uneven to subconchoidal.
Hardness is 6 - 7. Specific Gravity is approximately 2.6 to 2.8 Streak is white. Associated Minerals are quartz , microcline , albite , amphiboles , carletonite , lorenzenite , calcite , leucosphenite , natrolite and aegirine .