Carats measure the weight of the diamond, regardless of its cut.
A trustworthy gemologist will remove the stone from its setting, weigh it, and remount it, for a fee.
Chat with our AI personalities
Millimeter is a size measurement; carat is a weight measurement. Take the stone to a local jeweler and ask for its weight.
If the cut is round, this weight may rate in the just under 7 carats range. If it is a different cut, the weight will be different.
Carats describe the weight of a stone. A jeweler can show you the scale used for this purpose.
Carats are a unit of weight used to measure gemstones, including diamonds. One carat is equal to 200 milligrams or 0.2 grams. Gemstones are usually weighed using a precision scale that measures weight in carats.
Diamonds are weighed in carats, using a digital scale that has been certified. Unless you are a jeweler, it's best not to remove the stone for weighing it. Depending on the cut, a local jeweler may be able to measure it and give you a fair idea of its weight.