When examining a piece of gold jewelry, you may notice a small stamp such as 10K, 14K, 18K, 22K, or 24K. These markings indicate the purity of the gold used to make the item.

Understanding gold stamps can help you learn more about your jewelry, estimate its precious-metal content, and recognize why two pieces that look similar may have very different values. However, a stamp alone does not guarantee that an item is genuine. Professional testing is still the best way to determine its actual gold content.

What Does “K” Mean on Gold Jewelry?

The letter “K” stands for karat, which measures gold purity on a 24-part scale. Pure gold is considered 24 karats, meaning that nearly all 24 parts are gold.

Lower-karat jewelry combines gold with other metals. These additional metals may include silver, copper, zinc, nickel, or palladium. Mixing gold with other metals can increase its strength, change its color, and make it better suited for everyday wear.

Gold karats should not be confused with carats. Karats measure gold purity, while carats measure the weight of diamonds and other gemstones.

Gold Purity by Karat

Gold stamps Approximate gold purity Parts for example 10K is 41.7% 10 out of 24, 14K is 58.3% 14 out of 24, 18K is 75% 18 out of 24, 22K is 91.7% 22 out of 24 24K is 99.9% or higher Nearly 24 out of 24.

The higher the karat, the greater the percentage of gold the item contains. This generally means more precious-metal value per gram, although several other factors can influence the item’s total value.

What Does a 10K Gold Stamp Mean?

A 10K stamp means the item is approximately 41.7% pure gold. The remaining 58.3% consists of other metals.

Ten-karat gold contains the lowest amount of pure gold that can generally be marketed as solid gold jewelry in the United States. Because it contains a relatively high percentage of alloy metals, 10K gold is typically durable and resistant to scratching.

Its lower gold content also makes it more affordable than higher-karat jewelry. However, its precious-metal value per gram will normally be lower than an equivalent piece made from 14K, 18K, or 22K gold.

You may also see 10K gold marked as:

10KT
10 Karat
417 or 416

The numbers 417 and 416 refer to the item’s approximate gold fineness in parts per thousand.

What Does a 14K Gold Stamp Mean?

A 14K stamp means the item is approximately 58.3% pure gold. The remaining portion is made from alloy metals.

Fourteen-karat gold is one of the most common choices for jewelry in the United States. It offers a practical balance of gold content, affordability, color, and durability.

It is frequently used for:

Wedding bands
Engagement rings
Necklaces
Bracelets
Earrings
Watches
Everyday jewelry

Common 14K markings include:

14K
14KT
585
583

A 585 stamp means the item is approximately 58.5% gold, which is generally recognized as 14K gold.

What Does an 18K Gold Stamp Mean?

An 18K stamp means the jewelry is 75% pure gold. The remaining 25% consists of other metals added for strength, color, or workability.

Because of its higher gold content, 18K gold often has a richer appearance than 10K or 14K gold. It is commonly found in fine jewelry, luxury watches, designer pieces, and higher-end engagement rings.

Eighteen-karat gold is generally more valuable per gram than 14K gold, assuming the items have the same weight and are valued primarily for their metal content. However, 18K gold is also softer and may be more susceptible to scratches or wear.

Common 18K markings include:

18K
18KT
750

A 750 stamp means that 750 out of every 1,000 parts are gold, making the item 75% pure.

What Does a 22K Gold Stamp Mean?

A 22K stamp indicates that the item is approximately 91.7% pure gold. Only about 8.3% consists of other metals.

Twenty-two-karat gold has a deep, rich gold color and is especially common in jewelry produced in India, the Middle East, and parts of Asia. It is also used for certain bullion coins, including American Gold Eagles and South African Krugerrands.

Because 22K gold contains a large amount of pure gold, it can have substantial precious-metal value. It is also softer than 10K, 14K, or 18K gold, which may make it less practical for jewelry exposed to frequent impacts.

Common 22K markings include:

22K
22KT
916
917

What Does a 24K Gold Stamp Mean?

A 24K stamp typically indicates that the item is made from gold that is approximately 99.9% pure or higher.

Twenty-four-karat gold is considered pure gold for most commercial purposes. It has a distinctive yellow color and contains very little alloy metal. It is commonly used for gold bars, investment products, certain coins, ceremonial objects, and some styles of jewelry.

Although 24K gold contains the greatest amount of gold, it is also relatively soft. Jewelry made from 24K gold can bend, scratch, or deform more easily than lower-karat jewelry.

Common 24K markings include:

24K
24KT
999
999.9
9999

The numbers describe the item’s fineness. For example, 999 indicates approximately 99.9% purity.

What Do 417, 585, 750, 916, and 999 Mean?

Not every piece of gold jewelry uses a traditional karat stamp. Many items—especially those manufactured outside the United States—use a three-digit fineness mark.

Here are some of the most common conversions:

Fineness stamps Approximate purity Karat equivalent 375- 37.5%=9K, 417- 41.7%=10K, 585- 58.5%=14K, 750- 75%=18K, 916- 91.6% 22K, 999- 99.9% 24K

These markings indicate how many parts out of 1,000 are gold.

What Do the Letters Next to a Gold Stamp Mean?

Some jewelry includes additional letters or symbols beside the karat marking. These may identify the manufacturer, designer, assay office, country of origin, or production method.

Certain markings can also indicate that the item is not solid gold.

GF: Gold-Filled

A gold-filled item has a mechanically bonded layer of gold over a base metal. It contains more gold than typical gold-plated jewelry, but it is not solid gold throughout.

For example, “1/20 14K GF” indicates that 1/20 of the item’s weight is a 14K gold alloy.

GP or GEP: Gold-Plated

GP means gold-plated, while GEP usually means gold electroplated. These items have a thin gold layer applied over another metal.

Gold-plated jewelry generally contains far less gold than solid-karat jewelry.

HGE: Heavy Gold Electroplate

HGE stands for heavy gold electroplate. Despite the word “heavy,” the item is still plated rather than solid gold.

RGP: Rolled Gold Plate

Rolled gold plate uses a bonded gold-alloy layer over a base-metal core. It is not the same as solid gold.

Vermeil

Vermeil is sterling silver covered with a layer of gold. It may be stamped “925,” indicating that the underlying metal is sterling silver.

KP: Karat Plumb

A stamp such as 14KP usually means “14-karat plumb.” This indicates that the piece is intended to contain at least the full amount of gold required for that karat designation.

Does a Gold Stamp Guarantee That an Item Is Real?

No. A stamp is helpful, but it is not definitive proof that an item is genuine.

Counterfeit jewelry can carry false purity stamps. A clasp may also have been replaced with one from a different piece, or a plated item may be incorrectly marked. Older jewelry can contain repairs or solder with a different purity than the original metal.

Professional gold buyers consider the stamp only one part of the evaluation. Testing may include:

Visual inspection
Magnet testing
Electronic testing
Acid testing
Density testing
X-ray fluorescence analysis
Inspection for plating and base-metal exposure

At Sahara Coins & Precious Metals, we believe customers should understand how their items are evaluated. Our team can examine and test gold jewelry to help determine its actual precious-metal content.

Does a Higher Karat Always Mean More Valuable Jewelry?

A higher karat means that an item contains a greater percentage of gold, but that does not automatically determine its complete value.

Professional jewelry evaluations may also consider:

Total weight
Current gold market price
Gemstones
Designer or luxury brand
Age and historical significance
Condition
Craftsmanship
Collectibility
Resale demand
Whether the item is solid, hollow, filled, or plated

For scrap-gold purposes, weight and verified purity are usually the primary factors. A signed designer piece, antique item, or collectible jewel may be worth more than its melt value.

Gemstones and non-gold components may also need to be accounted for when estimating the actual gold weight.

How Is the Gold Value Calculated?

A simplified calculation begins with three pieces of information:

The item’s weight
Its verified gold purity
The current market price of pure gold

For example, a 20-gram piece of 14K jewelry is not equivalent to 20 grams of pure gold. Since 14K gold is approximately 58.3% pure, its estimated fine-gold content would be:

20 grams × 0.583 = approximately 11.66 grams of pure gold

This figure represents theoretical gold content before accounting for solder, stones, springs, non-gold parts, refining expenses, marketability, or dealer costs.

Where Can I Have Gold Jewelry Tested in Las Vegas?

If you have gold jewelry stamped 10K, 14K, 18K, 22K, 24K—or jewelry with no visible stamp—Sahara Coins & Precious Metals can help you understand what you have.

We buy and evaluate many forms of precious-metal jewelry, including:

Rings
Bracelets
Necklaces
Chains
Earrings
Broken jewelry
Dental gold
Estate jewelry
Gold watches and watch components
Unmarked or inherited gold items

Visit Sahara Coins & Precious Metals at 7293 West Sahara Avenue, Suite 106, Las Vegas, Nevada 89117. Walk-ins are welcome, and our experienced team can explain the evaluation process before you decide whether to sell.

Frequently Asked Questions

Is 14K or 18K gold better?

Neither is universally better. Fourteen-karat gold is generally more durable and affordable, while 18K gold contains more pure gold and often has a richer color. The best choice depends on your budget, preferences, and how frequently the jewelry will be worn.

Is 10K gold real gold?

Yes. A properly marked and verified 10K item is real gold, but only approximately 41.7% of its metal content is pure gold.

Is 24K gold completely pure?

Commercial 24K gold is generally 99.9% pure or better. Producing gold that is absolutely free of every trace element is extremely difficult.

Is 925 gold?

A 925 stamp normally indicates sterling silver, which is 92.5% silver. If the piece has a gold-colored surface, it may be gold-plated sterling silver or vermeil.

What if my jewelry does not have a stamp?

An absent stamp does not necessarily mean the item is fake. Hallmarks can wear away, clasps can be replaced, and some handmade or antique items were never marked. Professional testing is the best way to identify the metal.

Can fake jewelry have a 14K or 18K stamp?

Yes. Counterfeit and plated items can carry fraudulent stamps, which is why the metal should be tested before its value is determined.

Final Thoughts

Gold stamps provide valuable clues about the purity and composition of jewelry. In general, 10K contains 41.7% gold, 14K contains 58.3%, 18K contains 75%, 22K contains 91.7%, and 24K is approximately 99.9% pure.

However, a hallmark is only the beginning of an accurate evaluation. Testing, weight, condition, design, gemstones, brand, and market demand may all influence what a piece is worth.

If you would like to have your gold jewelry professionally evaluated in Las Vegas, visit Sahara Coins & Precious Metals for a transparent, no-pressure assessment.

Have gold jewelry, coins, or bullion you are considering selling? Learn about our transparent evaluation process and discover why customers choose Sahara Coins when they want to sell gold in Las Vegas