Scolecite
Image: Robert M. Lavinsky (CC BY-SA 3.0)
Mineral NameScolecite
Chemical FormulaCaAl₂Si₃O₁₀·3H₂O
Mohs Hardness5
Crystal Systemmonoclinic
Lustervitreous
Streak Colorwhite
Cleavageperfect on {110}
Fractureuneven
Specific Gravity2.25
Colorswhite, colorless, pink, salmon, yellow, red
Transparencytransparent
Type LocalityAurangabad District, Maharashtra, India
Mineral GroupSilicates (Zeolite Group)
Usescollector, spiritual
Associated Mineralspowellite, stilbite, heulandite, apophyllite, calcite
Rarityuncommon
Description
This image displays radiating sprays of white to colorless, acicular Scolecite crystals, forming delicate, fan-like aggregates. The crystals are typically slender and often terminate in sharp points.
Geological Context
Scolecite is a hydrothermal mineral commonly found in the amygdaloidal cavities and veins of basaltic volcanic rocks. It forms during the late-stage alteration of these rocks, often in association with other zeolites.
