If 7.7 is the carat weight, then the size is 7.7 carats. The millimeter measurements of a diamond with this weight will vary, depending on the cut.
A carat diamonds size is 3.5mm.
No, a one carat tanzanite gemstone and a one carat diamond are not the same size. Tanzanite is less dense than diamond, so a one carat tanzanite will typically appear larger in size compared to a one carat diamond.
Carat is not a measurement of size, its weight. 200 miligrams=1 carat
each carat is 200 miligrams
The carat size of a diamond should be determined by a certified jeweler. There are two different sizes the is the millimeter size which as stated was 7mm and then a jeweler can give a carat size.
carat
Your question implies that the number is less than one full carat, so you could also write it as .59 carat -- rounding up, meaning that the stone weighs just over half a carat.
It can be resized.
One carat equals 100 in this example. If the diamonds are of equal size, then each diamond weighs 4.5454545 carats.
1 carat = 100 cents = 6.5 mm = solitaire
The diamond weighs 40/100ths of a carat. Other measurements depend on the style of its cut.
Carat is a weight measurement for a diamond: here size matters -- bigger is better, biggest is best.