For diamonds, carat is the weight. I suspect that your 1.0 stone is a 1 carat stone.
Milliliters (ml) is a measure of liquid volume, which doesn't apply to diamonds, since they are not liquid.
The weight of a diamond is measured in carats, not in cents. So, a 30 cent diamond would not be equivalent to any specific weight in carats. To determine the carat weight of a diamond, it would need to be weighed using a scale calibrated to measure carats.
The size of a gemstone, such as a diamond, is measured in millimeters (mm) for its dimensions, not in carats. Carat is a unit of weight specifically used for measuring gemstones and diamonds, with one carat equal to 0.2 grams. So, 14mm would refer to the dimensions of the gemstone, not its weight in carats.
You're asking about carats, not carrots. Carats are units of measure used to weigh precious gem stones, including ruby and diamond. One carat weighs about .20 grams.
To convert grams to carats for a ruby stone, you would multiply the weight in grams by 5. Carats = grams x 5. Thus, for an 8.5 gram ruby stone, the weight in carats would be 8.5 x 5 = 42.5 carats.
The value of 1.45 carats of diamonds will depend on weather you have one single diamond or more. Do you have 145 diamonds with a total weight of 1.45 carats or 2 0.5 carat diamonds and a 0.45 carat diamond? Large diamonds are many many times more valuable than small ones and a single 1.45 carat diamond will be worth far more than tree diamonds with a total carat weight of 1.45 carats
There are 45.52 carats on the hope diamond
If the diamond is a round cut, a stone weighing a little over 3 carats would have the 9.5mm measurement at the girdle.
A 6mm stone would be a.75 carat diamond.
45.52 CaratsThe Hope Diamond is 45.52 carats. By comparison the average engagement ring is only 0.3 carats.
A round cut diamond weighing .25 carats measures 4.1mm at the girdle.
According to Wikipedia, below, this diamond weighs "755.5 carats (151 g)."
A round cut diamond weighing .25 carats measures 4.1mm at the girdle.
If the diamond is measured in points -- 106, you could translate this to 1.06 carats.
This diamond could weigh about six carats if its measurement is 10mm x 10mm.
From Wikipedia: "The Cullinan diamond is the largest rough gem-quality diamond ever found, at 3,106.75 carats (621.35 g)."
You can read more about the Spirit of de Grisogono black diamond, below, which weighs 312.24 carats.
The diamond total weight is 3.0, so the total weight of all the diamonds is 3.0 carats.