Inosilicate (chain silicate), wollastonite group
Specific gravity: 2.8 to 2.9
Hardness: 4½ to 5
Colour: White, grey, sometimes greenish, yellowish, colourless
Solubility: Slightly soluble in hydrochloric acid
Plutonic igneous environments
Pectolite is a secondary mineral similar in occurrence to
zeolites. It is found lining cavities in
At Copthill Quarry, Weardale, County Durham, England, UK, pectolite occurs with calcite (SY p164).
At the Clee Hill quarry, Titterstone Clee Hill, Shropshire, England, UK, pectolite has been found on dolerite (RES p296).
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