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American Dictionary of the English Language

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Zircon


ZIRCON, noun Called also jargon of Ceylon, a mineral originally found in Ceylon, in the sands of rivers, along with spinel, sapphire, tourmalin, and iron sand. zircon hyacinth, and zirconite, are regarded as varieties of the same species. They are essentially composed of the earth zirconia, with silex, and a minute portion of iron. The primitive form of the crystals is an octahedron, composed of two four sided prisms. The common form is a rectangular four sided prism.