mineral
Scolecite
Scolecite (CaAl2Si3O10·3H2O)
Hardness 5-5.5 on Mohs scale, vitreous to silky luster, monoclinic crystal system, acicular or prismatic crystal habit, perfect cleavage, white to pale beige/brown, specific gravity ~2.27
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Physical properties
Hardness 5-5.5 on Mohs scale, vitreous to silky luster, monoclinic crystal system, acicular or prismatic crystal habit, perfect cleavage, white to pale beige/brown, specific gravity ~2.27
Formation & geological history
Formed as a secondary mineral in basaltic cavity spaces (geodes and vugs) through low-grade hydrothermal alteration of volcanic rocks. Commonly associated with other zeolites like stilbite and heulandite.
Uses & applications
Popular among mineral collectors for its aesthetic prismatic/fibrous crystals and as a metaphysical crystal.
Geological facts
The name scolecite comes from the Greek word 'skolex', meaning 'worm', because the mineral curls up like a worm when heated under a blowpipe flame.
Field identification & locations
Identified by its slender, elongated prismatic or radiating fibrous crystals, low density, and association with volcanic basalt cavities. Commonly found in India (Nashik, Pune), Iceland, and Brazil.
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Schist
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Metamorphic
Septarian Pebble
Septarian nodule / Concretion
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Sandstone with Mineral Veining or Crust
Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)
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Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
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Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral