Investment status:
First of all, gold investment is mainly divided into physical gold, gold T+D, paper gold, spot gold, international spot gold (commonly known as London gold), futures gold, gold advance payment and people's livelihood gold, which are eight popular forms of gold investment.
Physical gold, buying and selling gold in kind by buying and selling gold bars and ornaments. Physical gold: in the form of 1: 1, that is, no matter how much gold is purchased in any currency, it can preserve its value, and it can only buy up, but not down, with a large amount of investment and complicated procedures and expenses. It's hard to tell true from false.
Cleaning method:
1, in order to protect the luster of gold jewelry, you can coat it with a thin layer of nail polish.
2. If there is a black silver film on the surface, 2 grams of salt, 7 grams of baking soda, 8 grams of bleaching powder and 60 ml of water can be used to prepare a "gold cleaner". Put the gold jewelry in a bowl, pour the detergent, take it out after 2 hours, rinse it with clear water (preferably not hard water), bury it in sawdust to dry, and then wipe it with a soft cloth.
3. Ring inlaid with gemstones Roll a piece of cotton with popsicles or matchsticks, soak it in a mixture of toilet water and glycerin, scrub the gemstone and its frame, and then polish the ring with flannel. Never scratch with sharp objects such as blades.
Above content reference: Baidu Encyclopedia-Gold