Stilbite on Quartz Jalgaon India
Stilbite is a tectosilicate mineral of the zeolite group consisting of hydrated calcium aluminium silicate. Usually a small proportion of the calcium is replaced by sodium. Crystals are monoclinic, and are commonly twinned, giving rise to complex groups and characteristic sheaf-like aggregates. The color is usually white, sometimes red, and on the perfect cleavage. The hardness is - 4 and the specific gravity The sievelike crystal structure of the zeolite stilbite enables it to separate hydrocarbons in the process of petroleum refining.
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Photo credit: © Phil Degginger/Jack Clark Collection / Alamy / Afripics
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Keywords: 14h2o, aluminium, calcium, crystal, crystals, geology, india, jalgaon, mineral, minerals, naca2al5si13o36, quartz, rock, silicate, specimen, stilbite, tectosilicate, zeolite
