18K gold is about 75% gold. When you sell it, the offer depends on that purity, the weight of the piece, and the gold market on the day of the evaluation. Cash 4 Gold & Pokemon Card Buyer tests and weighs 18K jewelry at 1220 NE 163rd St, North Miami Beach. Call (786) 722-2008.

Eighteen out of twenty-four parts is gold. The other six parts are alloy metals that change the color and the hardness. A stamp that reads 18K or 750 is the usual clue. Testing still confirms the stamp before anyone talks about money.

How 18K compares with other karats

• 10K is about 41.7% gold.
• 14K is about 58.3% gold.
• 18K is about 75% gold.
• 22K is about 91.7% gold.
• 24K is fine gold.

Higher karat means more gold in each gram of jewelry. It does not mean a light 18K chain outvalues a heavy 14K bracelet. Weight is the other half of the content. Two sellers with “18K rings” can hear very different offers because the rings do not weigh the same.

What the spot quote is doing

The published spot price is a wholesale reference for fine gold. An 18K offer starts from the gold inside the alloy, not from a chart that assumes a pure ounce. Refining and business costs sit between that market and the cash a seller receives. A clear buyer shows purity, weight, and how those facts become the number. You can decline for free.

Stones set in 18K are a separate question. A diamond can be evaluated on its own. Small accent stones often add less than people expect. The metal value remains even if a stone is missing.

What to do with the piece

Bring it as it is. Home cleaning does not raise the karat. A receipt shows what you once paid, which included design and retail markup. The selling offer is about confirmed gold content and the market today.

The store is open 24 hours, so the evaluation can happen the day you decide. Read what 14K gold is worth, what 10K gold is worth, and the cash for gold FAQ.

Questions people ask

Is 18K real gold?

Yes. 18K is 18 parts gold out of 24, about 75% gold. The rest is alloy.

What does a 750 stamp mean?

750 means 750 parts gold per thousand, which is the same purity as 18K.

Is 18K worth more than 14K?

Per gram of jewelry, 18K contains more gold than 14K. A heavier 14K piece can still contain more total gold than a light 18K piece.