Gold
Gold, a yellow precious metal with a chemical symbol of Au, is high in density, soft, corrosion resistant, and ductile is the highest among the metals known. The purity of gold is represented by K (Karat). 24K is 100% pure gold, so it is the most expensive, because the characteristics of gold are the softest and impatient, so most jewelry will use K gold to achieve the required hardness, durability and color.
Platinum (Platinum abbreviation Pt, also known as platinum, pure platinum)
It is a precious metal that is naturally produced by high density, ductility, toughness, gemstones, and grayish white. Even at high temperatures, it exhibits significant resistance to corrosion and is therefore considered a precious metal. At the same time, the density of platinum is quite high, and the same volume of platinum will be much heavier than gold and K gold.
In nature, platinum reserves are rarer than gold. The annual output of world platinum is much less than that of gold. In addition, the melting point of platinum is high, and it is more difficult to purify smelting platinum than gold, and the energy consumption is higher. Moreover, processing platinum requires a higher level of craftsmanship than processing gold. Therefore, the price of platinum is therefore more expensive than gold. The mark of Platinum in the international color is the words Pt, Plat or Platinum, and is represented by pure thousand digits, such as Pt950, which means the purity is 95%. The International Platinum Association (PGI) can only be called Platinum if it is PT850 or higher. The specifications of Platinum Jewelry are marked with Pt950, Pt900 and Pt850.
Pt950: 95% platinum, 5% binary alloy of palladium.
Pt900: 90% platinum, 10% binary alloy of palladium.
Pt850: Platinum is 85%, palladium and copper 15% ternary alloy.
K Gold (KGold)
K gold refers to the alloy of gold and other metals smelted together. Because of the softness of gold, it is easy to fall off due to insufficient strength when setting stones. Therefore, silver, copper, zinc and other metals are usually added to gold to increase the strength of gold. , toughness, to facilitate the inlay of high-grade jewelry, and the metal made in this way is called "K gold."
The white K gold complete and correct statement is white K gold, white K gold jewelry usually uses 18K or 750 to express the purity of gold contained in the situation.
K number
The K number is graded in terms of gold content (purity), 24K is pure gold, and the rest are K gold. The relationship between K number and gold content is: Auwt%=K/24X100%
The gold content of 75% is called 18K750, the content of 58.5% is called 14K585, and the content of 41% is called 10K. Among them, 18K gold has high ductility and high hardness, and is more stable than other K-number alloys. Often used in jewelry making.
The color-changing K gold is the most commonly used material in jewelry. It is the material with the most expression in precious metals. In global jewelry, K-gold is the mainstream, chic and unique, so it is in the jewelry industry. Long-lasting
Common K gold colors are as follows:
Yellow K gold is a yellow precious metal alloy, which is made up of gold and copper and silver.
White K gold is a white precious metal alloy, which is prepared by adding palladium or silver to gold.
Rose gold is a red precious metal alloy made from gold and copper and silver.