Q:

What is meant by 18KGP white gold?

A:

Quick Answer

A stamp reading 18KGP means that the jewelry is gold plated, so an 18KGP white gold item would be plated with 18 karat white gold. The metal underneath the gold is usually copper or silver, but these can diffuse into the gold and tarnish the color.

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Full Answer

Copper has a nickel-plated layer before adding the gold, while silver metals usually have layers of copper and then nickel. The nickel is a barrier metal that can help stop the primary metal from ruining the finish of the gold. If the barrier metal is not used, it can take only a few months to a few years before the gold is tarnished.

Karat is a term used to describe the purity of the metal and 18 karat gold is gold mixed with other metals, making it 75 percent pure. Each karat represents 1/24th of the gold's purity, or 4.1667 percent. Twenty-four karat gold is the purest, and 12 karat gold is 50 percent pure. Gold jewelry is usually sold at between 9 and 18 karat, and in the U.S. the minimum value for gold is 10. Gold is mixed with other metals in jewelry because gold as a metal can be damaged easily. Twenty-four karat gold is usually reserved for ceremonial or display use.

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    What is the difference between gold-filled jewelry and gold-plated jewelry?

    A:

    Gold-plated jewelry consists of a lower-quality base metal coated with a very thin layer of gold through a chemical process, while gold-filled jewelry has a thicker layer of gold bonded to a base metal through heat and pressure. Although both gold-plated and gold-filled jewelry consist of a base layer covered with gold, they differ in the process used to attach the gold and the thickness of the gold.

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    What is meant by 750 fine gold?

    A:

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    What does the imprint "18k HGE" mean on gold?

    A:

    The imprint "18k HGE" on gold essentially means that the gold is costume jewelry with little or no value. "HGE" stands for "hard gold electroplated," which means the object is not solid 18 karat gold throughout. "18k" refers to the type of plating used on the outer surface of the object.

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    What does 925 mean on gold?

    A:

    The number 925 stamped on a gold piece of jewelry usually means that the jewelry is not entirely gold; it is sterling silver that has been gold plated. The number normally indicates the purity of the silver used, not the quality of the gold.

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