Quartz,silicon oxide (silica),is one of the most abundant and ubiquitous minerals in the earth's crust. It is the primary constituent of beach sand and occurs in many colors,all of which are used as gemstones. Microcrystalline (cryptocrystalline) varie | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Arem, Joel |
Bildgröße: | 3851 px × 2550 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
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