• An Introduction to Simulants or Imitation Gem Materials

    This article provides an overview of synthetic gem materials.

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  • Lithium Tantalate PropertiesRoditi

    Plate Orientation Wave Type Coupling Factor Resonance Frequency Constant (MHz mm)

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  • QuartzWikipedia

    Quartz is a mineral composed of silicon and oxygen atoms in a continuous framework of SiO 4 siliconoxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO 2.

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  • Quartz Gemstone and Jewelry Information: Natural Quartz

    Quartz Gemstone Information: Quartz is one of the most important gemstones in the world, and comes in many forms. Learn about Quartz Gemstones and Jewelry Value at GemSelect

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  • The Quartz Page

    The Quartz PageThis site covers the mineral quartz and its many varieties.

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  • Smoky quartzWikipedia

    Smoky quartz is a grey, translucent variety of quartz that ranges in clarity from almost complete transparency to an almost opaque brownish gray or black crystal. Like other quartz gems, it is a silicon dioxide crystal.

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  • Quartz Crystals: A Guide to Identifying Quartz Crystals

    Quartz Crystals: A Guide to Identifying Quartz Crystals and Their Healing Properties, Including the Many Types of Clear Quartz Crystals [Isabel Silveira] on Amazon . *FREE* shipping on qualifying offers.

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  • The Quartz Page: Physical Properties

    The first example mineral composed of just 2 elements might already show differences in the properties of different crystal faces, but a force acting on or light passing through the crystal vertically will roughly have the same effect as in the horizontal direction.

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  • Metaphysical Properties of GemStones & Crystals

    Common Uses and metaphysical properties of stones, gemstones and crystals

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  • Our Service

    What you need is what we can do! In the future, Xinhai will continue to rely on three big supporting "technology, talents, management", adhere to the international development strategy, and concentrate on providing customers with modern, efficient, energy-saving mine overall construction and operational solution, to create international leading enterprises in mining industry.