Narsarsukite has been cut as a gemstone, although do not expect to see it available in many jewelry stores. It is cut mostly for gemstone collectors, but is considered attractive. A cut stone of 0.31 carats was cut from the mines of Mont Saint-Hilaire, Quebec and is the largest known narsarsukite gemstone. Narsarsukite's structure involves double chains of linked silicate tetrahedrons in a tube like arrangement. 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.