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Cleoniceras Ammonite
eye catching piece
The Structure of an apophyllite crystal consists of many layers
Diamond Apophyllite with Scolecite mineral specimen
A Green Drusy Heulandite Specimen from India
Green Drusy Heulandite Mineral Specimen (#1052) Uncracked Geode Cleoniceras AmmoniteApproximate Size: 2. 5 inches Green Drusy Heulandite mineral specimen. Location: Aurangabad Maharashtra, India. Facts: Heulandite has a sheet like open framework structure, classified as a tectosilicate, where it's structure is composed of interconnected six membered rings of silicate tetrahedra, creating channels within the crystal that allow it to act as a Zeolite, capable of exchanging cation like sodium, calcium, and potassium within its
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