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| Color origin of phenakites from the Ural emerald mines | 449 |
| January 2026 | February 2026 | March 2026 | April 2026 | May 2026 | June 2026 | July 2026 | |
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| Color origin of phenakites from the Ural emerald mines | 7 | 6 | 12 | 11 | 9 | 7 | 3 |
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| F_Spring_2018_Gems_Gemology.pdf | 340 |
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| Russia | 176 |
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| Kazan | 176 |