gold, platinum, silver alloys, difference between pure gold and gold alloys

ALLOYS OF GOLD, PLATINUM AND SILVER

Due to the low hardness and strength and to reduce the price, precious metals are often used in jewelry in combination with other metals. When two or more metals are mixed, the final product is called an alloy.

Precious metal alloys have been used by people for a long time, and their attitude towards them was different. Scammers who wanted to get rich added many impurities to gold, passing this alloy off as real gold. Jewelers added other elements to the gold to give the product strength. Jewelry began to be branded and indicated the gold sample. In France, gold products began to be ingrained in 1275.

 

The gold used in jewelry is basically an alloy. The metals added to gold are called ligatures. Gold forms alloys with many metals. The composition of gold alloys as alloying components may include silver, copper, palladium, rhodium, platinum, zinc, nickel, cadmium, and other metals.

Gold-silver alloys are soft, have good malleability, and are well amenable to mechanical processing. With an increase in the silver content, the color of the alloys changes from yellow to light yellow. Alloys differ primarily in the percentage of gold in them.

Silver alloys used in jewelry production, unlike gold, have only one alloying component - copper with an increase in the amount of copper in the alloys, their hardness increases, and the color changes from white to reddish-yellow.

Platinum and palladium alloys used in jewelry production have gold or copper as alloying components. Currently, jewelry platinum is an alloy consisting of 950 parts of platinum and 50 parts of gold or copper.

The technique of giving alloys different color shades was known to ancient masters.

Currently, alloys with various color effects are widely used in jewelry production:

Red gold is the most common and most ancient alloy. The desired effect is achieved by adding copper to the alloy.

Yellow gold is an alloy of gold with silver and copper.

Green gold is an alloy of gold with silver or cadmium. The green shade depends on the amount of silver used in the alloy.

Blue gold is an alloy of gold and steel.

White gold is an alloy of gold with metals, thanks to which it is intensively discolored. The best means of discoloration of gold are nickel and palladium. Less often, rhodium, platinum, zinc are used. White gold alloys have been known since the beginning of the 20th century. In jewelry, diamond frames are made from white gold with palladium (instead of platinum), and alloys from gold with nickel are used to produce less expensive gold products.

Purple gold is an alloy of gold and aluminum. It was first obtained in 1937, but due to heavy processing, it did not find distribution.