FL, IF grade diamond:
FL (defect-free)—There are no inclusions or gaps when observed under a magnifying glass of ten times.
If (there is no flaw inside)-under a magnifying glass of ten times, there is no inclusion, only a small gap.
VVS 1, VVS2 diamond:
VVS 1 (very, very small inclusions)-diamonds have tiny inclusions, which are extremely difficult to observe under a magnifying glass of ten times.
VVS2 (very, very small inclusions)-diamonds have tiny inclusions, which are difficult to observe under a magnifying glass of ten times.
VS 1, VS2 diamond:
VS 1 (very tiny inclusions)-diamonds have tiny inclusions, which are difficult to observe under a magnifying glass of ten times.
VS2 (Very Small Inclusions)-Diamonds have tiny inclusions, which can be easily observed under a magnifying glass of ten times.
SI 1, SI2 diamond:
Diamonds have obvious inclusions, SI 1 (small inclusions) are easy to observe under a magnifying glass of ten times, and SI2 (small inclusions) are easy to observe.
Pure silver is soft, malleable and easy to destroy. Therefore, pure silver is usually alloyed with other metals to increase its durability. The most popular alloy is standard sterling silver, that is, sterling silver jewelry with 92.5% silver and 7.5% copper.
Although any metal can constitute 7.5% non-silver, hundreds of years of experiments have proved that copper is the best alloy collocation, because the alloy containing copper can not only improve the hardness and durability of metal, but also not affect its beautiful color.
Adding a small amount of copper will not have much effect on the value of pure silver. On the contrary, the price of pure silver products will be affected by the production of products, the skills of craftsmen and the complexity of design.
Because 100% pure silver is soft, it is only used when its plasticity is needed, such as intricate designs such as handicrafts to show its weaving.
Because standard sterling silver is both beautiful and durable, it has become a common material for making jewelry and accessories. The qualified quality mark of pure silver includes the following contents:
● Pounds.
● Pure silver
● 925
Under your careful care, your high-quality sterling silver jewelry will accompany you all your life. To minimize scratches and damage, please put your sterling silver jewelry in a cloth bag or in a separate layer of the jewelry box. In order to avoid damage to silver jewelry, please avoid making jewelry close to common chemicals in daily life.
You should maintain your sterling silver jewelry to prevent it from losing its luster. When it reacts with sulfur or hydrogen sulfide in the surrounding environment, it loses its luster. If you want to clean your silver ornaments, you can use a special polishing agent to restore their luster. You can also use pure silver polishing agent, solution or silver cloth to restore the luster of pure silver jewelry.
Although wearing sterling silver jewelry often is the best way to prevent it from losing its luster, cleaning all your jewelry regularly will also prevent your jewelry from losing its luster and keep its original luster.
Remember: when buying sterling silver jewelry, you should look at the high-quality logo marked on the bottom of the jewelry or the logo engraved by the manufacturer. So as to ensure its quality.
Gold knowledge:
Gold Au is one of the earliest known metals, and people often use the gold standard to define the world circulation system.
24k = 100% gold
Jewelry made of 24k gold is too soft, and it is only suitable for making gold jewelry alone.
22 karat = 9 1.7% gold
22k gold is too soft to be used in jewelry.
18 = 75.0% gold
18K gold is recommended as fine jewelry and widely used in China.
14 = 58.3% gold
14k gold can also be considered as jewelry, which is widely used in Europe and America.
12 = 50.0% gold
12k is not recognized by the jewelry industry.
10 carat = 4 1.7% gold
In China, it is defined as real gold by law.
Because pure gold is too soft to withstand the pressure of daily wear, gold is usually alloyed with other metals such as silver, copper, nickel and zinc to increase its hardness and durability. K, the unit of gold purity. Numbers are usually added after the letter K, indicating the purity of gold and the gold content of this kind of jewelry. If it is 24k, it means that the gold content is 100%.
Platinum: Because the gold content of 18k platinum is 75% and that of 14k platinum is 58.3%, the jewelry made of these metals is slightly yellow. In order to increase its whiteness, almost all platinum is plated with a shiny and extremely hard metal-rhodium. With the increase of wearing times of this kind of jewelry, after a period of time, the rhodium plated on the surface may be worn off, revealing the original metallic color. Re-plating rhodium is a simple procedure, so you can still restore the original charm of your jewelry.
Gold maintenance: remember: keep your gold ornaments away from corrosive chemicals such as chlorine and cleaning agents, reduce daily wear and prolong the color life of gold. The method of cleaning gold is as follows: wash gold gently with soap and warm water solution (bald brush is better). Gold should be stored separately in soft cloth bags or original packaging boxes to avoid contact with daily substances.