Brass than in brass produced by cementation. These may be "natural alloys" manufactured by smelting zinc rich copper ores in redox conditions. Many have similar tin contents to contemporary bronze artefacts and it is possible that some copper-zinc alloys were accidental and perhaps not even distinguished from copper. However the large number of copper-zinc alloys now known suggests that at least some were deliberately manufactured and many have zinc contents of more than 12% wt which would have resulted in a distinctive golden color. By the 8th–7th century BC Assyrian cuneiform tablets mention the exploitation of the "copper of the mountains"
Industrial rock sales and awards bands featured in this page, arranged by number of awards: The following list is composed by IFPI certificated albums only (no Soundscan): Industrial rock sales and awards This is a page containing all available sales and awards from industrial rock and industrial metal artists. This list is far from complete. Many countries were excluded from it because their Industry Associations lacked a searchable, online database. Belgium, Iceland and Mexico are some of them. Some European countries who do have it (Greece, Hungary and Spain) were excluded anyway, because their databases showed no relevant sales pertaining industrial rock and metal groups.