Quartz streak test. The streak test is used to determine the colour of a mineral in powdered form. It is done by scraping a specimen across a piece of unglazed porcelain known as a streak plate. Quartz has a white streak. It is a crystalline mineral composed of silicon dioxide, SiO2. Quartz is defined to have hardness of 7 in the Mohs scale. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Science Source / Turtle Rock Scientific |
Bildgröße: | 5167 px × 3440 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |