Cut the gold bars or jewelry with scissors, and observe the section with a magnifying glass. If you see white bright spots, because gold and iridium can't blend together, it means that gold is doped with iridium.
2. Measure the specific gravity.
First, measure the weight of a pure gold bar with a balance, then put the gold bar into a measuring cup and pour water to drown it. Then put the detected gold bars into a measuring cup and observe whether the scale of water rises or falls. As long as there is a change, it means that gold bars are not pure gold. But if it is gold jewelry, this method is not applicable, because there is air in gold jewelry.
Real gold is not afraid of fire.
Put gold bars or gold jewelry on the fire for a period of time and observe its changes. Because iridium will combine with oxygen in the air to produce oxidation reaction, gold bars with insufficient purity will turn gray; And pure gold will appear bright red after being baked by fire. However, this method may have some damage to jewelry.
Extended data
Safir's development and innovation have been highly praised by relevant state departments and all walks of life, enjoying high popularity and reputation. It has successively won "China Famous Trademark", "20 12 Most Competitive Brand in China's Jewelry Industry", "Most Popular Brand by Consumers" and "China Gold and Silver Jewelry Famous Brand".
Many honors, such as "Famous Brand in China's Jewelry and Jade Jewelry Industry", "Top Ten Brands Favored by Consumers in China's Jewelry Industry" and "Most Competitive Brand in China's Jewelry Market", have gradually become the leading brands of fashion trends in China's jewelry market.
At the end of 20 13, CoCo Lee, an international superstar, joined us and became the brand image ambassador of Safir Jewelry. In 20 14, Safir Jewelry cooperated with CCTV's most concerned and popular "Avenue of Stars" column. And teamed up with the popular variety show "Good Songs of China" to support China's music and original value.
Baidu encyclopedia -Safir
Baidu encyclopedia-gold