What's the difference between brass and gold

Different hardness. Gold: Pure gold is soft and low hardness. Nails can make shallow marks and teeth can leave teeth marks. Gold ornaments with high fineness are softer than those with low fineness. Brass: the more copper the harder, bending method can also test hardness, pure gold soft, easy to bend, the lower the purity, the more difficult to bend.

Density measurement. Gold is denser than brass.

Roasted with fire. Gold: Real gold is not afraid of fire. Burn the gold to be identified with fire red, and observe the color change after cooling. If the surface is still the original gold color, it is pure gold. Brass: Copper oxide containing copper that is oxidized to black when roasted. That IS TO SAY, IF THE COLOR DARKENS OR DIFFERENT degree BLACKENS, IT MAY be BRASS, general color is lower, color is thicker, all blackens, it must be brass.

With dilute acid. Gold: strong corrosion resistance, in dilute acid, is no bubbles.

Brass: Put in dilute acid inside, bubble out is fake, because fake goods are mixed with zinc, will react with acid.

With acetaldehyde, CuSO4 solution. Gold: The same as above, gold has strong corrosive, heated into, is no reaction. Brass: after heating into acetaldehyde solution, the red is brass (that is, false gold), add CuSO4 solution, there is a red metal precipitated is brass.

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