Large and fine faceted blue topaz gemstone,a fancy trillion weighing about 50 carats. Although natural blue topaz of this color does exist,the vast majority of such stones are colored artificially by subjecting white (colorless) topaz to irradiation and heat | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Arem, Joel |
Bildgröße: | 3851 px × 2550 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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