golden
Gold, the symbol of the chemical element Au, is a soft, golden yellow and corrosion-resistant precious metal. Gold is one of the rarest and most precious metals. The chemical symbol of GOLD is Au, and the English code is XAUUSD or gold. The name Au comes from the story of Aurora, the goddess of dawn in a beautiful Roman myth, which means shining dawn.
Characteristics of gold:
colour
The beauty of golden yellow can be compared with the beauty of the sun. The steam released when gold melts is green; Its gold powder is usually brown when it is melted; If it is cast into thin slices, it can transmit green light.
tractility
Extremely powerful. 1 oz gold can be stretched to 50 miles long, and its ductility makes it easy to cast, making it a good choice for making jewelry. Of all metals, gold has the greatest pulling force.
forgeability
Second to none. It will cause extremely thin gold sheets to roll up easily. Gold weighing 65,438+0 ounces can be hammered down to 65,438+0 _ 4 million and 65,438+000 square _ area. The ancients hammered it into thin slices and threw it into temples and palaces for decoration. It is said that 1 ounce of gold can be used to build the roof of a house. If you have a chance to visit these ancient temples, you should pay attention to it, otherwise free gold tablets will fall on your head.
As a precious metal, gold has good physical properties. "Real gold is not afraid of fire" means that gold is not easy to melt under the general flame. High density and heavy touch. Good toughness and ductility, good electrical conductivity. Pure gold is bright yellow, but the color changes greatly after mixing with other metals, such as gold-copper alloy is dark red, and silver-containing alloy is light yellow or grayish white. Gold is easily ground into powder, which is also the reason why gold is dispersed in nature. Pure gold jewelry is also easy to wear and lose weight.
platinum
Platinum is a natural white precious metal. According to the national regulations, only jewelry with platinum content above 85% can be called platinum jewelry, and it must be marked with Pt.
Characteristics of platinum:
clean
Platinum is white and pure, which is a perfect expression and a true reflection of the inside. The platinum content of platinum jewelry is generally 950‰, so it will not fade and change color, and it can still maintain luster with the passage of time. The natural white luster of platinum can best reflect the true light of diamonds. The purity of platinum is also very suitable for skin wear. Because it contains no impurities, platinum will not cause allergic reactions to the skin.
infrequent
Platinum is the rarest precious metal in the world, and it is sought after by people who pursue life taste. Platinum is 30 times rarer than gold. In the world, it can only be mined in a few places. If all the platinum in the world is poured into an Olympic standard swimming pool, its depth is not enough to cover the instep, but gold can fill three swimming pools. The rarity of platinum makes it more noble and different, and can fully show your personality.
eternal
The density and weight of platinum make it more durable than other jewelry metals. 1 6 inch square (15cm) platinum cubic weight 165 pounds (75kg), which is equivalent to the weight of an ordinary male. Platinum is resistant to heat and acid, will not wear, and can hold precious jewelry stably and safely. All precious metals leave scratches, including platinum. However, scratches on platinum only move the metal, not reduce its volume. If visible scratches appear on platinum, qualified jewelers can polish it again.