• Freeform black opals - opal gems

    Black Opal – Natural, Other, Black, 60 ct

    Black opal: Australia (freeform cabochons approximately 30 cts each). Photo © Joel E. Arem, PhD, FGA. Used with permission.

    Article: Opal Stones and Gems: Value, Price, and Jewelry Information

    Credit: Joel E. Arem, PhD, FGA

    GemstoneOpal Stone, Black Opal, Precious Opal
    Natural or man madeNatural
    Carat Weight<i class="fa fa-square facet-search-color-swatch" style="color:#e61047"></i> slightly purplish Red (slpR)
    Gem StateOther
    Photo phenomenaPlay of Color