M MineralystRock & Mineral Guide
Mineral

Pectolite

Pectolite — reference photo

Pectolite is a mineral with the chemical formula NaCa2Si3O8(OH). It has a Mohs hardness of 4.5 - 5 and vitreous to pearly luster.

Pectolite properties

TypeMineral
Chemical formulaNaCa2Si3O8(OH)
Mohs hardness4.5 - 5
LusterVitreous to pearly
Typical colorsTypically white, gray, green, or blue
FormationForms in alkaline metamorphic rocks and in hydrothermal veins
Rarity6 / 10

Mohs hardness 4.5–5 — medium

1 · Talc5 · Apatite10 · Diamond
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