CT stands for “carat,” a unit used to measure a diamond’s weight. You might see “CTTW” written as “CT TW” for some engagement rings. What Does CTTW Mean in a Diamond Ring?ĬTTW stands for “carat total weight,” or “total carat weight.” It’s a metric that’s used to measure the total weight of all of the diamonds in a specific piece of jewelry, such as a tennis bracelet or a pavé diamond ring.
If you put a 1ct center diamond into this ring, you will have a 4.07 cttw engagement ring. There are 3.07 carats worth of accent diamonds on this ring. Or you can look at this very elaborate and ornate halo setting for an engagement ring also from Blue Nile. That means they are 2.18 carats combined. If you’ve spent time looking at engagement rings and other diamond jewelry online, you may have noticed the acronym “CTTW” alongside other important details such as cut, clarity, color and carat weight.įor example, these are beautiful diamonds for a 2.18cttw pair of earrings from Blue Nile.
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