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16.52.01: Larimar

Gemology · LibreTexts

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    Larimar
    Chemical composition NaCa2Si3O8(OH)
    Crystal system Triclinic
    Habit Aggregate
    Hardness 5
    Optic nature Biaxial +
    Refractive index 1.59 - 1.63
    Birefringence 0.028-0.038
    Dispersion Very weak
    Specific gravity 2.62 - 2.87
    Lustre Silky
    Fluorescence Yellow or orange (SW-UV)

    A blue pectolite found in the Dominican Republic. See pectolite

    Acknowledgments and External Links

    Gems & Gemology, Winter 1989 Issue Larimar
    Blue Pectolite from the Caribbean

    16.52.01: Larimar is shared under a CC BY-NC-SA license and was authored, remixed, and/or curated by LibreTexts.