Brass
Brass is a term for alloys made of copper and zinc in a solid solution. Usually it contains more than 50% copper and between 5 and 20% zinc, and is different from bronze ie alloys of copper and tin. Despite the differences between these two terms, there are also some types of brass called bronze. The brass is yellow, slightly resembling gold. It is relatively dull, and often used as an ornament. Brass has been known to humans since prehistoric times, much longer than the time of zinc discovery. It is produced by copper smelting together with cinine, a zinc ore. Throughout this process, zinc is extracted from cinnamon and is instantly mixed with copper. Pure zinc is too reactive to produce using ancient metal work techniques.