The first taboo: it is forbidden to mix neck ornaments and cosmetics. In case the jewelry is contaminated with oily cosmetics, it will affect the luster of the jewelry, so it should be strictly separated. So try not to wear a neck ornament when making up.
The second big taboo: don't wear neck ornaments in the shower, and don't let jewelry touch objects such as detergents. Although precious metals will not "rust", they may be oxidized and react with detergents, which should improve the luster and quality of neck ornaments.
The third taboo: it is forbidden to put the neck ornaments in chemical gas or polluted environment. All jewelry has special opportunities for sulfur, and colored gems also has special opportunities for pesticides and sprays. Don't wear a neck ornament when entering the laboratory.
The fourth taboo: do strenuous exercise or heavy work without wearing a neck ornament. On the one hand, it avoids the strong impact and friction on jewelry, on the other hand, it avoids the corrosion of fatty acids and urea in sweat on jewelry.
Fifth bogey: It is forbidden to mix necklaces of various materials with other jewelry. Hard jewelry will scratch other jewelry, so it is best to put your own necklace alone.
The sixth bogey: don't mix the gold necklace with mercury. When gold necklace is mixed with mercury, it will have a chemical reaction and produce mercury-containing vapor.
The seventh bogey: colored gems's neck ornaments are forbidden to be washed with water. Colored gems, such as pearls, Turkish gems, opals, corals, amber, etc. These colored gems are highly absorbent. If washed with clear water, the gems will crack.
Eighth bogey: It is especially forbidden to place colored gems neck ornaments in high temperature environment. Too high temperature will cause dehydration, cracking and discoloration of gems, so friends who work in high temperature environment should not wear neck ornaments.