If you see 999 stamped on gold, it means the item is supposed to contain 999 parts pure gold out of 1,000.
In other words:
999 gold = 99.9% pure gold = approximately 24K gold
This is extremely high-purity gold and is commonly described as fine gold or pure gold. If you are comparing other jewelry stamps, see our guide to gold jewelry hallmarks.
You may see 999 on gold bars, bullion coins and some jewelry. You may also encounter markings such as 999.9, .999 or 9999.
They look similar, but there are a few differences worth understanding.
Quick Gold Purity Chart
| Gold Mark | Purity | Approximate Karat |
|---|---|---|
| 999.9 / 9999 | 99.99% | 24K |
| 999 | 99.9% | 24K |
| 995 | 99.5% | 24K |
| 916 / 917 | 91.6–91.7% | 22K |
| 750 | 75.0% | 18K |
| 585 | 58.5% | 14K |
| 417 | 41.7% | 10K |
| 375 | 37.5% | 9K |
The fineness system measures gold in parts per thousand, while the karat system measures it in parts out of 24. The London Bullion Market Association (LBMA) describes fineness as the number of parts of pure gold per thousand parts of metal.
What Does the 999 Stamp Mean on Gold?
A 999 gold stamp is a fineness mark.
It indicates that the item should contain:
- 99.9% pure gold
- About 0.1% other material
- Virtually no alloy metals
This is why 999 gold is commonly referred to as fine gold.
The decimal point may also be written differently. For example:
999 = .999 = 99.9% gold
The important number is the proportion of actual gold in the metal.
Is 999 Gold Real Gold?
Yes. Authentic 999 gold is real gold.
In fact, it is among the purest forms of gold commonly bought and sold.
However, there is an important distinction:
A piece being stamped 999 does not automatically prove that it is 999 gold.
Stamps can be incorrect or counterfeit.
The same applies to jewelry marked 10K, 14K, 18K or 24K. A hallmark is useful information, but the metal should still be tested when its authenticity or value matters. Learn more about how to tell if gold is real.
Is 999 Gold the Same as 24K Gold?
For practical purposes, 999 gold is considered 24K gold.
The karat system divides gold into 24 parts. The Federal Trade Commission explains that 24K is pure gold and that lower-karat jewelry contains progressively more alloy metal.
Mathematically:
999 ÷ 1,000 = 99.9% gold
Because commercially refined gold is rarely literally 100.000% pure, extremely high-purity gold such as 999 and 999.9 is commonly classified as 24 karat gold.
So which description is better?
Both can be correct:
24K describes the gold using the karat system.
999 describes the gold using the fineness system.
What Is the Difference Between 999 and 999.9 Gold?
This confuses a lot of people.
999 Gold
99.9% pure gold
999.9 Gold
99.99% pure gold
Gold marked 999.9 is sometimes called “four nines” gold because the number may also be written as 9999 or .9999.
The Royal Mint notes that 999.9 represents 99.99% pure gold.
The actual purity difference is tiny:
999 gold: 0.1% non-gold material
999.9 gold: 0.01% non-gold material
For most individual sellers, the weight of the item will make a much larger difference in its value than the difference between 999 and 999.9 purity.
What Does “Fine Gold” Mean?
Fine gold refers to the amount of actual pure gold contained in an item.
You may see terms such as:
- Fine gold
- Gold fineness
- .999 fine gold
- 999.9 fine gold
- Fine gold content
For example, a bar stamped:
1 OZ FINE GOLD 999.9
is telling you both its weight and its stated purity.
It contains one troy ounce of gold at a fineness of 999.9.
Does Fine Gold Always Mean 999?
Not necessarily.
This is one reason it is important to read the actual fineness number.
For example, the LBMA Good Delivery technical specifications permit gold bars with a minimum fineness of 995 parts per thousand, even though many modern investment bars are refined substantially higher.
So when buying or selling gold, look for the actual purity number, not simply the words “fine gold.”
Where Is 999 Gold Commonly Found?
You are especially likely to encounter 999 or higher-purity gold in:
Gold Bars
Investment bars are frequently made from extremely high-purity gold.
Common markings include:
- 999
- 999.9
- .9999
- 24K
- FINE GOLD
A legitimate bar may also have a refiner’s name or logo, weight, serial number and assay information.
Gold Coins
Many modern bullion coins contain very high-purity gold.
However, not every valuable gold coin is 999 gold.
Some well-known gold coins use lower-purity alloys while still containing a specified amount of pure gold.
Never assume a gold coin should be valued only for its melt value. Certain coins can be worth more because of their rarity, condition, date or collector demand.
Gold Jewelry
999 jewelry exists, but it is less durable than lower-karat jewelry because very pure gold is soft.
That is one reason jewelry is often made from alloys such as:
- 22K
- 18K
- 14K
- 10K
Adding other metals can make jewelry harder and more resistant to everyday wear.
Why Is 999 Gold So Soft?
Pure gold is naturally soft and malleable.
That is useful when gold is being refined or formed, but it can be a disadvantage for jewelry that is worn every day.
For example, a high-purity gold ring may scratch or bend more easily than a similar 14K or 18K ring.
This doesn’t make 999 gold inferior.
It simply means purity and durability are two different things.
Can Fake Gold Be Stamped 999?
Yes.
A 999 marking alone does not guarantee an item is genuine.
Counterfeiters can stamp almost anything into metal.
A fake piece could potentially be marked:
- 999
- 24K
- 18K
- 14K
- 10K
That is why professional testing matters.
Warning Signs
Be cautious if:
- The color looks unusual
- The item is attracted strongly to a magnet
- Plating is wearing through
- The weight feels wrong for its size
- The hallmark appears poorly made
- The seller cannot explain where the item came from
But none of these tests alone proves whether an item is genuine.
How Can You Tell If 999 Gold Is Real?
There are several ways gold can be evaluated.
1. Check the Hallmarks
Look carefully for markings such as:
999, 999.9, 24K or FINE GOLD
Also look for a manufacturer’s mark, refinery logo or other identifying information.
2. Check the Weight
Gold is extremely dense.
An item whose weight is inconsistent with its dimensions may deserve further investigation.
3. Magnet Test
Gold itself is not magnetic.
However, passing a magnet test does not prove something is gold because many other metals are also nonmagnetic.
4. Professional Gold Testing
When real money is involved, professional testing is much more reliable than trying to identify gold from its color or stamp alone.
Professional precious-metal buyers may use methods including electronic testing, acid testing, density measurements and X-ray fluorescence (XRF) analysis depending on the item. Gold Kings offers professional precious-metal testing at its Georgia locations; see how the selling and testing process works.
How Much Is 999 Gold Worth?
The value of 999 gold is primarily determined by:
Weight × Gold Purity × Current Gold Price
Because 999 gold is 99.9% pure, the basic calculation is:
Weight × 0.999 × current pure-gold value
For example, a 10-gram piece of 999 gold contains approximately:
10 × .999 = 9.99 grams of pure gold
The dollar value changes constantly because the gold spot price moves throughout the trading day.
This is why you should check the current gold price rather than relying on an old chart or article. You can also use our gold value guide to understand the basic calculation.
Is 999 Gold Worth More Than 14K or 18K Gold?
Per gram, yes.
999 gold contains significantly more pure gold.
For comparison:
999: 99.9% gold
18K / 750: 75% gold
14K / 585: 58.5% gold
10K / 417: 41.7% gold
If two items weigh exactly the same, the 999 gold item contains substantially more actual gold.
However, jewelry can also have value from:
- Brand
- Design
- Gemstones
- Age
- Rarity
- Collectibility
So melt value is not always the entire story.
999 vs. 916 Gold
Another marking you may encounter is 916.
916 gold is approximately:
91.6% pure gold = 22K gold
By comparison:
999 = 99.9% = approximately 24K
So 999 gold contains more pure gold per gram than 916 gold.
999 vs. 750 Gold
750 gold is 75% pure gold, which corresponds to 18K.
Therefore:
999: 99.9% gold
750: 75% gold
Both are real gold, but 999 contains considerably more gold by weight.
999 vs. 585 Gold
A 585 stamp means 58.5% pure gold, which is the standard fineness associated with 14K gold.
Therefore:
999 = approximately 24K
585 = approximately 14K
If you’ve ever wondered why European jewelry sometimes says 585 instead of 14K, it is simply using the fineness system rather than the karat system.
Should You Sell 999 Gold as Scrap Gold?
Not automatically.
Before selling high-purity gold, determine what the item actually is.
A broken piece of high-purity jewelry might primarily be worth its gold content. If that is what you have, read our guide to selling scrap gold for the best price.
But a recognized bullion bar or collectible gold coin may have additional market value.
Before selling:
- Identify the item.
- Confirm its weight.
- Confirm its purity.
- Check the current gold price.
- Determine whether it has collectible or bullion value above melt.
- Compare the buyer’s offer with its actual gold value.
A knowledgeable gold buyer should be able to explain how the offer was calculated. Before visiting, you can also review what Gold Kings buys.
Where Can I Sell 999 or 24K Gold in Georgia?
If you have 999 gold, 24K jewelry, gold bars or bullion that you are considering selling, have the item tested before accepting an offer.
Gold Kings buys gold based on its actual weight, purity and current market value. We test and weigh your items in front of you, explain what you have and make a no-pressure offer.
Gold Kings of Snellville
3635 Stone Mountain Hwy, Snellville, GA 30039
770-771-4650
This is the recommended Gold Kings location for customers in Snellville, Loganville, Lawrenceville, Grayson, Lilburn, Stone Mountain and surrounding Gwinnett County communities.
Gold Kings of Commerce
480 Banks Crossing Dr, Commerce, GA 30529
706-336-0043
This is the recommended Gold Kings location for customers in Commerce and surrounding Northeast Georgia communities.
Not sure what your gold is worth? Request a free Gold Kings quote before you visit, or read our customer reviews and testimonials.
We test it. We weigh it. We pay you.
Frequently Asked Questions
Is 999 gold pure gold?
Yes. 999 gold is 99.9% pure gold and is commonly referred to as pure or fine gold.
Is 999 gold 24K?
Yes. 999 gold is generally classified as 24K gold because it is nearly pure gold.
What does .999 mean on gold?
.999 means the same thing as 999: the item is stated to be 99.9% pure gold.
What does 999.9 mean on gold?
999.9 means the item is 99.99% pure gold. It may also be written as 9999 or .9999.
Is 999.9 better than 999 gold?
999.9 is slightly purer than 999 gold, but both are extremely high-purity gold and are commonly classified as 24K.
Is 999 gold more valuable than 18K gold?
Per gram, 999 gold normally has a higher gold value because it contains 99.9% gold, compared with 75% gold in 18K.
Can jewelry be made from 999 gold?
Yes. However, 999 gold is softer than alloyed gold, so it can scratch and bend more easily when used for everyday jewelry.
Does a 999 stamp prove gold is real?
No. A stamp is not proof by itself. Counterfeit items can carry fake purity markings, so valuable items should be professionally tested.
What is the difference between 999 and 916 gold?
999 is 99.9% pure and approximately 24K. 916 is about 91.6% pure and approximately 22K.
Where can I sell 999 gold?
Look for a precious-metals buyer who can verify the item’s purity and weight, explain the current gold value and show you how the offer was calculated. In Georgia, you can visit Gold Kings of Snellville or Gold Kings of Commerce for professional testing and a no-obligation offer.
