Brass didn’t just lie down into one type of Brass there are tons of differences in Brass like there are… “Admiralty brass, Alpha brasses, Alpha-beta brass, Aluminum brass, Arsenical brass, Beta brasses, Cartridge brass, Common brass, DZR brass, Gilding metal High brass, Leaded brass, Low brass, Naval brass, Red brass, Rich low brass, White brass Yellow brass” from all those I have said Brass share the same proportion of calamine ore (Zinc) and Copper.