Carat is a measure of weight, and may correspond roughly to the diameter of the stone, but not perfectly.
Depending on the quality of the diamond, it might be cut a little deeper which could result in a smaller diameter.
It may also be cut a little shallower, which would make it have a larger diameter.
A stone that is cut to ideal proportions will always have more brilliance than a stone that is cut a little too deep or a little too shallow, both of which are undesirable.
A 1.75 carat Round Diamond with excellent proportions should measure 7.8 MM at the girdle.
Finally, how a stone is set can affect it's appearance.
A two-carat round cut measures in diameter about 8.2mm at the girdle.
A four-carat round cut diamond measures about 10mm at the girdle. Different cuts would have various mm measurements for each weight.
An eighth of a diamond carat, if it is a round cut, measures about 3.2mm at the girdle.
These two measurements are not directly related. If the diamond is cut in a round, brilliant cut, the carat weight may be between .15 and .20 carats. If the diamond is of a different cut, then the carat weight will be different.
Depending on the cut, a five carat diamond always weighs five carats. If the cut is round brilliant, the mm measurement at the girdle is about 11.
A two-carat round cut measures in diameter about 8.2mm at the girdle.
A half carat diamond of this cut measures 5.2 mm at the girdle; a .65 carat diamond measures 5.6 mm at the girdle. A certified gemologist can give you the exact carat weight of your diamond.
I just bought a 0.5 carat diamond ring w/ side stones (.251 carat) from ACME Jewelry for P140,000.00
Using the query 'diameter' assumes that the diamond is a round brilliant cut. A 2.50 carat round brilliant cut measures about 9MM at the girdle -- your diamond's diameter will be slightly shorter.
A one carat diamond in the round brilliant shape measures aproximately 6.5mm at the girdle. If the diamond is another cut, measurements will be different.
Carats refers to weight, not size. You should ask for measurements. Two round diamonds of equal carat weight are not necessarily the same size. Also the shape is a factor. A 1.80 ct pear shape diamond can look much bigger than a 1.80 ct round cut diamond.
A 1.00 carat round brilliant, when properly cut, should measure approximately 6.5 mm in diameter.
A four-carat round cut diamond measures about 10mm at the girdle. Different cuts would have various mm measurements for each weight.
A 6mm stone would be a.75 carat diamond.
A one-half carat diamond, in a round brilliant cut, measures about 5.2MM at the girdle.
it is 1.67856mm
Yes, the 5.85 Carat Round Princess Invisible Diamond Engagement Ring is available in titanium.