File:Tanzanite-Heating.png
From The Gemology Project
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Photo showing Tanzanite crystals before and after heating, demonstrating the valence reduction and color change.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 03:46, 8 September 2016 | 1,137 × 373 (229 KB) | Antony Zagotas (talk | contribs) | Photo showing Tanzanite crystals before and after heating, demonstrating the valence reduction and color change. |
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