Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleNatural Black Coral with Polyp Structure.AuthorsCooper, Amy; LeCroy, Britni; Skalwold, Elise A.; Koivula, John I.AbstractThe article provides information on an examination of a large black oval cabochon that was opaque with a slight waxy luster.SubjectsGARNET; CORALS; POLYPSPublicationGems & Gemology, 2021, Vol 57, Issue 4, p383ISSN0016-626XPublication typeArticle