Non nacreous pearl from the “spiny oyster”: 6.97 ct bicolored white and pink Spondylus p
Non nacreous pearl from the “spiny oyster”: 6.97 ct bicolored white and pink Spondylus pearl with a beautiful reflective blue coloration a flame structure when viewed in certain directions under a single white light source. Photo by Robert Weldon/GIA. The spiny oyster shells occur in reds, oranges and purples depending on their diet. Because of their vibrant colors spiny oyster shells are often used in jewelry; especially Native American jewelry. -- source link
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