First, the birthstone
Second, how to choose the size of the ring finger ring
The standard size of the ring is called the hand size. The modern hand is represented by the number, the minimum is 5 and the maximum is 35. The size of the Orientals is between 8 and 28. When buying a ring by hand, it is better to wear a ring in the summer, and it is better to wear it in the winter, but it does not fall off. When wearing a ring, if you feel too loose, you can wrap a few red lines or threads in the ring of the ring. If you feel too tight, you can apply some soap on your fingers so that you can put it off smoothly.
Third, how to choose the size of the jade bracelet ring
When choosing a jade bracelet, you should be able to put the jade bracelet into 4 long fingers (except the thumb) and go to the "tiger mouth", feel a little tighter, then take the jade bracelet off and measure the inner diameter, for example, just 55mm, then, this size is right for your ring. Some people like to wear a little looser. When choosing, choose a circle that is 1 to 2 mm larger, so that it can be easily put on and taken off. There are also some people who are used to wearing smaller jade bracelets, or don't plan to take them down when they are put on them. In this case, you can reduce the size by 1 to 2 mm. Generally, when you choose, you should try it first. When trying on, you can apply some detergent or soapy water on your hands, and ask someone to help, put the jade bracelet into your wrist with a little force.
Fourth, the difference between platinum and K platinum
In the non-standard market, Platinum and K Platinum are used to be called Platinum, so some consumers doubt whether Platinum and Platinum are a metal?
Platinum, also known as platinum, is English PLATIUM, generally with the abbreviation PT. The gold jewellery sold by the merchant with 18K white gold or 18KWG is a white alloy containing 25% palladium or nickel in gold. It is actually a kind of K gold with a gold content of 75%.
Platinum and K gold can be distinguished from the following points:
1. Platinum is a natural pure white metal, K white gold is an alloy of gold and palladium, nickel, silver and zinc, so it is also known as K white gold.
2. Platinum is rare, the annual output is much less than gold, more precious.
3. Platinum has a high density, and a piece of platinum jewelry is 20% heavier than a piece of K-Platinum.
4. Platinum is resistant to strong acid, alkali corrosion, oxidation, and chemical properties are more stable than K platinum.
5. Platinum jewellery is marked with “PT†and color. For example, “PT900†refers to the jewelry platinum product, the content of platinum is 90%. The mark of K Platinum, such as "18KWG", is based on the gold content contained in it.
Platinum is a random name, the standard name should be: Platinum, K Platinum
5. Know the seal on the inner ring of the ring.
When you are picking a gemstone ring, do you notice the seal on the inner ring? Generally speaking, jewelry rings sold in regular jeweler locations are marked with seals on the inner ring. For example, a diamond weighing 0.23ct, platinum into PT900 platinum diamond ring, the inner ring should be labeled: "PT900, 023" and other words. Consumers can identify these tags based on the price tag and the test certificate. If it is an 18K gold ruby ​​ring, the inner ring should be marked with the words "18K or 750". Knowing this, is it helpful for your purchase.
6. What are gems and jade?
Gemstones are the most beautiful and precious class of stone. It is bright in color, crystal clear, shiny, hard and durable, and rare. It is a natural mineral single crystal for diamonds, such as diamond, ruby, sapphire, emerald, etc. There are also a few natural single mineral aggregates. For example, there are a few organic non-minerals, such as amber, pearl, coral, coal and ivory, which are also included in the general gem.
Jade is also the beauty of stone. It is lower than the quality of the gemstone in terms of texture and price. But it also has bright colors, a hard and delicate texture, and has a shiny luster after polishing. Jade has a narrow and broad sense. The narrow sense refers only to jadeite (represented by Burmese jadeite) and nephrite (represented by Hetian jade); the broad sense includes many minerals and rocks used in art and crafts. As for colored stone, it refers to low-grade arts and crafts stone which is more beautiful and delicate in color and texture, but has lower hardness and less luster but can meet the processing requirements. Some scholars advocate the inclusion of colored stones in the broad sense of jade, or temporarily use colored stones as a synonym for jade.
7. How many kinds of gemstone minerals are there?
At present, nearly 3,000 mineral and mineral aggregates have been discovered in nature. Among them, there are more than 230 kinds of minerals and aggregates that can be used as gemstones, and there are only more than 30 kinds of common gemstone raw materials. Its chemical composition is natural elements, oxides, hydroxides, silicates and phosphates.
More than 30 kinds of gemstones are: diamond (diamond) ruby ​​(corundum), sapphire (corundum), emerald (beryl), opal (gold emerald), aquamarine, opal (precious opal), care Paishi (topaz), lapis lazuli, crystal, amethyst, tourmaline (tourmaline), purple tooth (garnet stone), tanzanite (dragon stone), hibiscus stone (rose crystal), zizi stone (opal stone) ), Australian jade (green chalcedony), large ruby ​​(spinel), Turkish jade (turquoise), olivine, pink (rose meringue), malachite, soft water amethyst (fluorite), jade (hard jade) ), Hetian jade (nephrite), jade jade (serpentine), jade jade (alteration gabbro), Xinyi jade (serpentine), Shoushan stone (pariec stone), Qingtian stone (parestone), Bloodstone (pyramid, cinnabar) and so on.
Eight, how is the gold content of K gold calculated?
One of the characteristics of gold is its softness, so it is difficult to inlay a variety of exquisite styles, especially when it is inlaid with pearls, precious stones and jadeites. Therefore, people add a small amount of silver, copper, zinc and other metals to the gold to increase the strength and toughness of gold. The gold ornaments made in this way are also called K gold. K gold can be made into various colors according to needs. There are various colors of K gold jewelry popular in the world. Everyone has yellow and white. When gold is mixed with 25% palladium or nickel, it will become white, and the main component that makes up it is gold. This is called white gold.
At the current state of the art, it is not possible to extract pure gold materials with a purity of 100%. Therefore, the gold standard K indicating the pure gold content in the gold product is generally referred to as pure gold as 24K gold, but it is theoretically gold with a gold content of 100%, which does not actually exist. Therefore, in the national standard, the gold content of the merchant's gold jewelry should not use the "24K gold" non-standard standard method. Since the pure gold is 24K, that is, the theoretical gold content is 100%, 1K means that the gold product contains 1/24 of pure gold, about 4.16%. 18K gold represents 18/24 gold, which is 75% pure gold, and the rest are other materials such as silver or copper.
As the saying goes, "Gold is not full of red", generally gold jewelry contains less than 1% of other metals. For the quality of gold products, the national standard has a very clear regulation, that is, each piece of gold jewelry sold by the merchant must be listed to indicate its gold content and weight. The weight of gold jewelry is always subject to the national legal unit of measurement. The gold content should use “K gold†(excluding 24K gold), “foot gold†(with gold content not less than 99%), “thousands of gold†(including gold content not less than 99.9%), and “1000 foot pure gold†or “ Pure gold" and the standard methods of "24K gold" and "9999" which do not exist in practice.
Nine, the color of silver
(1) sterling silver: also known as Baoyin, the theory is 100%, but it is difficult to do in practice, generally not less than 99% is called sterling silver.
(2) Full silver: Also known as 98 silver, the English symbol is 980S, which contains 98% silver and 2% copper.
(3) 92.5 Silver: English symbol 925S, which contains 92.5% silver and 7.5% copper.
(4) 80 silver: also known as tide silver, the English symbol is 800S, the hardship contains 80% silver, and contains 20% copper.
Ten, the world's four major diamond processing centers and five gem processing centers
The world's four major diamond processing centers are:
(1) Small particle diamond processing center - Mumbai, India;
(2) Large Grain Diamond Processing Center - New York, USA;
(3) Exquisite Diamond Processing City - Antwerp, Belgium;
(4) Exquisite small diamond processing center - Tel Aviv, Israel
The world's top five gemstone processing centers are:
(1) World Gem City - Germany Idar-Oberstein;
(2) Emerald roughing city - Jappur, India;
(3) Sapphire City - Bangkok, Thailand;
(4) Jade and the "four emperors and one post" processing center - Hong Kong;
(5) Middle and low grade gem processing city - Kofu, Japan.
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