Pyrite 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. Pyrite (fool's gold) has a black streak. Pyrite is composed of iron disulphide (FeS2). | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Science Source / Turtle Rock Scientific |
Taille de l’image : | 5167 px × 3443 px |
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Property Release : | Non requis |
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