If the diamond is a round cut, the measurement would be 7.4 mm at the girdle.
If the diamond is of another cut, the measurement would be different.
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.
A four-carat round cut diamond measures about 10mm at the girdle. Different cuts would have various mm measurements for each weight.
Forty-five carats is large for any diamond. For reference, a five carat princess cut diamond measures 9.5 x 9.5 mm.
The millimeter size of a diamond of this weight varies, depending on the cut. If the gem is round cut, its measurement at the girdle will be between 16.3 mm (15 carats) and 17.6 mm (20 carats).
If the diamond is a round brilliant cut, the 3mm measurement at the girdle indicates that the diamond weighs about 1/10th of a carat, or .10 carats.
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.
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.
A four-carat round cut diamond measures about 10mm at the girdle. Different cuts would have various mm measurements for each weight.
At the girdle, this stone would measure about 6.5 mm.
A round cut diamond, cut to industry standards, that is 5.1 mm across the face of the diamond (the top) weighs half a carat.
A 1.75 carat diamond billiant cut is about 7.8 mm and a 2.00 carat stone is about 8.2 mm at the girdle. In order to know the exact carat weight of a stone, one must take it to a certified gemologist and ask that it be removed from its setting and weighed.
A round, brilliant cut diamond measuring 6.5 mm at the girdle weighs about one carat.
Forty-five carats is large for any diamond. For reference, a five carat princess cut diamond measures 9.5 x 9.5 mm.
Depends on the cut. Carat is a measure of weight, not length, width, depth, area, or volume. What you are asking is kind of like asking how many inches is a pound of lead.Another AnswerIf the quarter carat diamond is a round cut, its mm measurement at the girdle is 4.1. If the cut is a different cut, see the answer, above.
1 carat = 6.5 mm
A two carat round brilliant cut stone will measure about 8.2 mm. A different cut will have a different measurement.
The millimeter size of a diamond of this weight varies, depending on the cut. If the gem is round cut, its measurement at the girdle will be between 16.3 mm (15 carats) and 17.6 mm (20 carats).