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| Color origin of phenakites from the Ural emerald mines | 395 |
| July 2025 | August 2025 | September 2025 | October 2025 | November 2025 | December 2025 | January 2026 | |
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| Color origin of phenakites from the Ural emerald mines | 4 | 20 | 46 | 8 | 7 | 3 | 1 |
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| F_Spring_2018_Gems_Gemology.pdf | 287 |
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| Russia | 176 |
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| Kazan | 176 |