What is "pectolite"

Pectolite \Pec"to*lite\ (p[e^]k"t[-o]*l[imac]t), n. [L. pecten a comb + -lite.] (Min.) A whitish mineral occurring in radiated or fibrous crystalline masses. It is a hydrous silicate of lime and soda.

n. (context mineralogy English) a gray-white mineral inosilicate hydroxide of calcium and sodium that crystallizes in the triclinic system, with the chemical formula sodiumcalcium₂silicon₃oxygen₈(Ohydrogen).

Pectolite is a white to gray mineral, Na Ca Si O(O H), sodium calcium inosilicate hydroxide. It crystallizes in the triclinic system typically occurring in radiated or fibrous crystalline masses. It has a Mohs hardness of 4.5 to 5 and a specific gravity of 2.7 to 2.9. The gemstone variety, larimar, is a pale to sky blue.