Beryl

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Jewelry 101--Minerals
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  • Beryl

    Though beryllium can be extracted from beryl most of us are more familiar with the gemstones emerald (deep green), aquamarine (greenish blue to blue), and morganite (pink to orange), that consist of the mineral beryl. Though these three gems are the most well-known here are a few more beryl gemstone varieties and colors.

    *Pure beryl is actually colorless, the other beryl gems are colored by impurities found in the beryl.


    Beryl often crystalizes in perfect, six-sided hexagons. Though crystals may be enormous in size, some up to 30 feet long, beryl may also be short, stubby crystals, and occasionally in tabular crystals and plates. The bases of beryl crystals are usually flat; pyramidal terminations are rare.
















    Specs


    Chemical FormulaBe3Al2Si6O18 Variable Formula (Be,Na,Li,Ce)3Al2Si6O18CompositionBeryllium aluminum silicate, occasionally with some sodium, lithium, and cesium
    ColorLight to emerald green, light to deep sky-blue, blue-green, yellow, pink, purple, red, orange, brown, colorless, white, and gray. May also be multicolored blue, green, yellow, or white, and may also have deeper color highlights on one crystal end.
    Crystal SystemHexagonalHardness7.5-8
    TransparencyTransparent to opaqueLusterVitreous, waxy


    Diagram
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