Karat vs Carat: What's the Difference?
Two words that sound identical but mean completely different things.
“Karat” and “carat” sound the same and are constantly mixed up — but they measure totally different things. Clearing this up takes thirty seconds and makes you a sharper shopper.
Karat (with a K) = gold purity
Karat measures how pure gold is, out of 24. 24K is pure gold; 14K is 14 parts gold to 10 parts other metals. More on this in Gold Karats Explained.
Carat (with a C) = gemstone weight
Carat measures the weight of a gemstone. One carat equals 0.2 grams. It is one of the famous 4 Cs of stone quality — see The 4 Cs of Gemstone Quality. Note that carat is weight, not size, so two stones of the same carat can look different sizes depending on the cut.
An easy way to remember
K is for Karat and gold (think “K for Karat, K for Karigari/craft of metal”); C is for Carat and the stone's weight. Keep the letters straight and you will never confuse a salesperson's terms again.
Why it matters when buying
A listing might say “14K gold, 2 carat moissanite.” Now you know that describes the metal purity and the stone weight — two separate things — so you can compare pieces accurately.
FAQs
Is it karat or carat for gold?
Karat, with a K — it measures gold purity out of 24. Carat with a C is for gemstone weight.
Does a higher carat mean a bigger stone?
Not always — carat is weight, so cut and shape affect how large a stone actually looks face-up.
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