999 Gold: What the 24K Stamp Means

A small gold bar, a coin from a trip to Dubai, a thin bracelet from a grandmother in Hong Kong. Turn any of them over and you may find three nines: 999. It looks like a serial number. It is actually the best possible news about the metal in your hand.

Quick answer: 999 gold is 24 karat gold, which means 99.9% pure gold. Out of every 1,000 parts, 999 are gold, and the last part is a trace of something else. It is the purest gold you can buy, and it is used mostly for bars, coins and traditional jewelry. Below: what the stamp means, 999 vs 999.9, whether you can wear it every day, and how much 999 gold is worth per gram today. If you want the full list of gold numbers, see our gold number code guide.

What is 999 gold?

Gold purity is counted in two ways. Karats count out of 24. The stamp, called fineness, counts out of 1,000. 999 gold and 24K gold are the same thing, written two different ways.

The World Gold Council puts it simply: 24 carat is pure gold, with no other metals mixed in. Every lower karat is gold mixed with silver, copper or other metals, which change the colour and make it harder.

999 vs 999.9 gold: what is the difference?

You may also see 999.9, called four nines. It means 99.99% pure. Both count as 24 karat, and the difference is one hundredth of a percent of other metals.

Stamp	Also called	Pure gold	Where you see it
999	24K, three nines, fine gold	99.9%	Jewelry, small bars, many coins
999.9	24K, four nines	99.99%	Investment bars and bullion coins
995	Almost 24K	99.5%	Large bars traded between banks
916	22K	91.6%	916 gold

For a ring or a bracelet you will never notice the difference between 999 and 999.9. For a bar you buy as an investment, the stamp and the maker's mark matter more, because they decide what a dealer will pay you later.

Is 999 gold real gold?

A genuine 999 stamp means real, solid, almost pure gold. In countries with official hallmarking, 999 is one of the standard gold marks. The Assay Office London lists 375, 585, 750, 916 and 999 as the international gold finenesses, and explains that a piece is always marked to the lowest standard it meets, never rounded up.

The stamp on its own proves nothing, though. A 999 punched into plated brass costs almost nothing to make. Pure gold is heavy and very soft, so if a 999 piece feels light, rings like steel when you tap it, or is cheap for its weight, have it tested. Our guide on how to tell if gold is real covers the safe checks.

Can you wear 999 gold every day?

You can, but it will not stay perfect. Pure gold is soft. A fingernail can mark it, a 24K ring can bend out of round, and stones are hard to hold securely in metal that soft. That is why almost all fine jewelry with diamonds is made in 14K or 18K.

• Good for: plain bangles, chains and pendants that do not take knocks, and pieces bought partly as savings, a tradition in China, India and the Gulf.
• Not great for: engagement rings, rings with stones, and anything you wear while working with your hands.
• The upside: 24K never tarnishes and is very kind to sensitive skin, because there is almost nothing in it but gold.

If you love the deep colour but want a ring that lasts, 18K is the usual answer. It is 75% gold and much tougher. We explain it in 750 gold and compare it with 14K in 14K vs 18K gold.

How much is 999 gold worth per gram?

Because 999 gold is almost pure, its value is very close to the gold price itself.

999 gold value per gram = gold price per gram × 0.999

On 10 November 2026, gold traded at about $4,074 an ounce, or $130.97 per gram. That put 999 gold at about $130.84 per gram. Gold moves every day, so redo the sum with today's price.

Piece	Pure gold inside	Melt value (10 Nov 2026)
1 g bar	1.00 g	about $131
10 g bar	9.99 g	about $1,308
1 oz coin (31.1 g)	31.07 g	about $4,070
100 g bar	99.9 g	about $13,084

So how does a 10 gram piece of 24K compare with the gold in everyday jewelry? Here is the gold inside the same weight in each karat:

Remember that a dealer or pawn shop will pay less than melt value, and jewelry also carries the cost of the work that went into it. A handmade ring is priced for its design and stones, not just its weight.

Why we do not make 24K jewelry

We have been making jewelry in Yerevan since 2010, and we work in 14K and 18K only. Our rings, like the half eternity ring, hold diamonds that need firm prongs, and 24K is simply too soft for that. For chains we use 18K, like our 18K gold chain, and our diamond cross necklace is 18K too, so both keep their colour and stay strong.

Want something heavier in gold for a special occasion? Our custom gold jewelry service can make a piece in 18K, the highest karat we trust for daily wear.

Frequently asked questions

Is 999 gold the same as 24K?
Yes. 999 is the fineness stamp and 24K is the karat. Both mean 99.9% pure gold.

Is 999 gold pure gold?
It is as pure as gold jewelry and coins get, 99.9%. The last 0.1% is trace metal left after refining. 999.9 gold goes one step further to 99.99%.

Is 999 better than 916?
It has more gold, so it is worth more per gram and has a deeper colour. 916 (22K) is harder, so it holds its shape and stones better in jewelry.

Does 999 gold tarnish?
No. Pure gold does not tarnish or rust. It can scratch and lose its shine, which a soft cloth and warm soapy water bring back.

Can 999 gold bend?
Yes, quite easily. Thin 24K rings and bangles can bend with normal wear, which is why it is rarely used for rings with stones.

How much is 999 gold per gram?
Multiply the gold price per gram by 0.999. On 10 November 2026 that came to about $130.84 per gram.

Is 999.9 gold better than 999?
It is slightly purer, 99.99% instead of 99.9%. For jewelry the difference is invisible. For investment bars, 999.9 from a known refiner is the usual standard.

Back to the three nines

So those three nines mean exactly what they look like: nearly nothing but gold. It is the right choice for a bar, a coin or a traditional bangle. For a ring you will wear every day and hand down one day, a little alloy is what keeps it beautiful.

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