File:Tanzanite-Heating.png

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Photo showing Tanzanite crystals before and after heating, demonstrating the valence reduction and color change.

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current03:46, 8 September 2016Thumbnail for version as of 03:46, 8 September 20161,137 × 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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