• Silica mineralBritannica

    Silica mineral: Silica mineral, any of the forms of silicon dioxide (SiO2), including quartz, tridymite, cristobalite, coesite, stishovite, lechatelierite, and chalcedony.

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  • The Quartz Page: The Silica Group

    The basic structural element of silica is the SiO 4 tetrahedron.Quartz consists of interconnected SiO 4 tetrahedra that build up a rigid three dimensional network (discussed in detail in the chapter Quartz Structure).

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  • Excalibur Mineral CorporationCurrent List

    Current List: Each month, we offer an abbreviated selection of minerals from our inventory of over 200,000 samples. If you don't see what you're looking for here, or on our Recent Catalogs pages, or on our Rare Species lists, please request a special quote by mail, email, fax or telephone.

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  • Silicon dioxideWikipedia

    Silicon dioxide, also known as silica (from the Latin silex), is an oxide of silicon with the chemical formula Si O 2, most commonly found in

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  • silicaDefinition & FactsBritannica

    Other constituents of traditional ceramics are silica and feldspar. Silica is a major ingredient in refractories and whitewares. It is usually added as quartz sand

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  • FulguriteWikipedia

    Fulgurites (from the Latin fulgur, meaning "lightning") are natural tubes, clumps, or masses of sintered, vitrified, and/or fused soil, sand, rock, organic debris and other sediments that can form when lightning discharges into ground.

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  • Ancient Atomic Knowledge?bibliotecapleyades

    As we look at a bit of what is being called evidence of ancient atomic warfare (or simply atomic explosions), it is important to make a distinction.

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  • Lechatelierite Mineral Data

    Lechatelierite Trinitite. Comments: Fused silica sand (trinitite) generated by the first nuclear (fission) bomb.Although man made and not a

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  • Metaphysical & Healing Properties of Gems Minerals Crystals

    Metaphysical & Healing Properties of Gems, Minerals, & Crystals ~ Over 300 Species Are Included ~ Regularly Updated List

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