1. Weighing: the proportion of gold, silver, copper, lead, zinc, aluminum and other metals. As the volume of gold is more than 40% of the weight of silver, more than 1.2 times the weight of copper, 6.1 times heavier than aluminum. Gold jewelry should feel heavy in your hand, fake gold necklaces are lighter. This method does not apply to gold jewelry set with gemstones. Look at the hardness: pure gold is soft, low hardness, with fingernails can draw shallow marks, teeth can leave teeth marks, high fineness of the gold necklace is softer than the low purity of the copper-containing hardness is getting higher and higher, the bending method can also be hardness test, gold is soft, easy to bend, the lower the purity, the less easy to bend. Listen to the sound: fineness in more than 99% of the gold to be hard to throw, a sound, no rhyme or stretch. Fake or low purity gold sound brittle and not frustrating feeling, a "dangdang" sound, the sound is lingering sound, landing after a serious beating.

2, look at the mark: domestic gold jewelry are prepared according to purification, international standards and stamps, such as "24K" marked "red" or "gold"; 18K gold, labeled with "18K", less than the fineness, in accordance with the provisions of the gold mark can not win. At present, the common lawless elements in society counterfeit grade, imitation stamps, with thin gold, gold, and even brass pretending to be gold, and according to the comprehensive judgment of the samples to determine the authenticity of gold jewelry.