Barite,barium sulfate,is an important mineral in oil drilling but is seldom cut as a gemstone. The yellow gem from S. Dakota weighs 4.7 carats,the white stones from Colorado weigh 9.4 and 1.9 carats | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Arem, Joel |
Bildgröße: | 3839 px × 2550 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
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