Magnetite 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. Magnetite has a black streak. Magnetite is composed of iron oxide (Fe3O4, iron(II, III) oxide). It is a naturally-occurring ferromagnetic and can be magnetized to become a permanent magnet. Magnetite is an important ore of iron. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Science Source / Turtle Rock Scientific |
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