• non-nacreous pearl and diamond ring

    Calcareous Concretions – Natural, Rough, White

    While the non-nacreous pearl in this three-stone diamond ring has a round shape like a classic true pearl, it also shows a faint, flame-like structure on its surface. This effect is due to the arrangement of aragonite in non-nacreous pearls and isn't found in true, nacre-bearing pearls. Photo courtesy of liveauctioneers.com and Fellows.

    Article: Calcareous Concretions Value, Price, and Jewelry Information

    Credit: Fellows

    GemstoneCalcareous Concretions
    Natural or man madeNatural
    Jewelry typeRing
    Gem StateRough