• almandine garnet - gem identification

    Almandine Garnet – Natural, Faceted, Red

    Red garnets, like this almandine, may also resemble rubies. However, unlike rubies, garnets have no birefringence. Gemologist can used a dichroscope to test for birefringence. But, some almandines may show anomalous birefringence or anomalous double refraction (ADR). A polariscope examination can help spot ADR. Photo by Didier Descouens. Licensed under CC By-SA 3.0.

    Article: An Introduction to Gem Identification

    Credit: Didier Descouens

    GemstoneGarnet, Almandine Garnet
    Natural or man madeNatural
    Gem StateFaceted