Photographed from the GIA Collection for the CIBJO project. Feldspar from the Dr. Eduard J. Gubelin Collection. Group of three moonstones, top to bottom: GIA collection# 33095, 71.91 ct, India; GIA collection# 31610, 8.25 ct, Sri Lanka; and GIA collection# 31609, 6.73 ct, Sri Lanka.
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