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16.4.11: Azul Verdadero

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    Berilo Azul Verdadero
    Composición química Be 3 Al 2 (SiO 3) 6 Silicato de aluminio y berilio
    Sistema de cristal Hexagonal
    Hábito Prismático
    Escote Pobre, basal
    Fractura Concoidal a desigual
    Dureza 7.5
    Naturaleza óptica Uniaxial -
    Índice de refracción 1.57 - 1.59
    Birrefringencia 0.004 - 0,009
    Dispersión Bajo, 0.014
    Gravedad específica 2.69
    Lustre Vítreo
    Pleocroísmo Distinto (tonos de color del cuerpo)

    Descubierto en el Yukón, Canadá en 2004. Una aguamarina excepcionalmente azul oscuro, cuyo color es el resultado de una altísima concentración de hierro. A diferencia del berilo Maxixe, el color es fotoestable, lo que significa que es resistente a la decoloración.

    True Blue Beryl es un nombre comercial de aguamarina mediana a azul oscuro de Canadá, comercializada por True North Gems.

    Enlaces externos


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