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Precious metal
Usually refers to the four metals of gold, silver, platinum, and palladium that are expensive, beautiful in appearance, stable in chemical properties, and have strong ability to maintain value. The status of gold is particularly important.
As the world's financial landscape is reorganized and inflation is alleviated, the status of gold and other precious metals has declined, but it is still regarded as the world's universal medium of exchange and value preservation tool.
When precious metals are traded in the market, they are often cast into ingots or coins, such as gold bars or gold coins in the gold trading market. The four precious metals mentioned above are also the most commonly used raw materials for making jewelry.
Gold
Gold is one of the chemical elements, and the chemical symbol Au comes from the Latin: Aurum. Pure gold is a bright, lustrous, yellowish-reddish, soft, high-density, malleable metal.
Gold has been a popular precious metal since before recorded history and is used for currencies, hedging items, jewelry and works of art. The 9999 pure gold and 18K gold we have heard about are all cast from gold.
9999 pure gold means that the gold content reaches 99.99%, so it is called thousand pure gold or 24K gold.
18K gold is a mixture of 75% pure gold and 25% other gold precious metals (such as silver, copper, palladium). It is much harder than pure gold, so it is more suitable for inlaying diamonds and gems.
Silver
Silver is a soft, white-glossy transition metal with the highest electrical conductivity, thermal conductivity, and reflectivity of all metals.
Silver has always been regarded as a precious metal and is one of the seven commonly used metals. Silver has been used in human culture for a long time. In addition to currency and investment media (coins and gold bars), silver is used in solar cells, water filtration, jewelry, decorative items, and high-value tableware and utensils (called silverware).
However, with the advancement of technology in precious metals in the jewelry industry, and the hardness of 18K gold can be many times higher than silver, it is now rare to use silver to inlay diamonds or precious gems. When it comes to jewelry or gemstones, 18K gold or PT platinum is used in most cases.
Platinum
Platinum is a gray-white precious metal with high density, high ductility and low reactivity. It is a transition metal.
Platinum is a very inactive metal. Even at high temperatures, it has strong corrosion resistance and is a corrosion-resistant metal. Because of its ability to resist corrosion and retain luster, platinum is suitable for making jewelry. Usually 90% to 95% platinum alloy is used. 90% platinum alloy is called PT900, and 95% platinum alloy is called PT950.
PT950 is the platinum alloy most commonly used to make jewelry in history. Its platinum content reaches 95%, so it is also called pure platinum.
Due to the high ductility of PT950, with diamonds set on top of it, more stones would fall out than in 18K gold. Therefore, PT900 was used to set diamonds. Due to its lower ductility and higher hardness, stones would fall off. has also been significantly improved.