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Drilled natural pearls examined in this study.
Four Pinctada maculata bead-cultured blister pearls
Terri Ottaway stands behind a table with several very large quartz crystal specimens are lined up on it. Some of them come up to her waist height.
Fall 2016 Gems & Gemology Cover

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Summer 2017 Gems & Gemology
G&G Summer 2017 Edition
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