Gold jewelry in the fake often fish, some of the lawless elements of the community often brass (copper, zinc alloy) posing as gold fraud activities. Because the brass from the color, shape point of view, and gold is very similar, it is difficult to Cartier love bracelet replica distinguish. Identification of true and false gold, 1, more hardness, hardness is false gold. 2, on the flame to see whether the change in black, black is false gold. 3, immersed in dilute hydrochloric acid to see if there is no bubbles, if the bubble is false gold. 4, immersed in silver nitrate solution to see whether the surface of the sample silver-white material, if there is false gold. Physical properties: 1, hardness: pure gold soft, low hardness, with a nail can draw a small mark, teeth can be left teeth teeth, fineness of high gold jewelry than the fineness of the soft, copper more hard, Test hardness, pure gold soft, easy to bend, the lower the purity, the more difficult to bend. 2, measuring density: gold density. Chemical properties: 1, into the dilute acid inside, there are bubbles out of the fake, because the fake more mixed with zinc, will react with the acid. 2, on the fire burning, the so-called real gold is not afraid of fire replica cartier jewelry, fake gold because of containing copper, under the fire will be oxidized into black copper oxide. 3, after heating into the acetaldehyde solution, red is brass (that is, false gold)