Spiny Oyster Turquoise Sterling Silver PendantAn orange that comes from the ocean and a blue that comes from copper in the desert groundthe defining color pairing of Southwest lapidary tradition. Spiny oyster refers to the shell of Spondylus speciesbivalve mollusks related to scallops, native to Pacific and Gulf of California waters, whose shells range from vivid orange to deep red and have been traded inland across the American Southwest for over 2,000 years. Turquoise is a copper aluminum