Differing units of measure may be based in commerce.
A diamond excavator isn't digging up just diamonds. The material in the volcanic pipe surrounding the diamond material far outweighs the diamond material. The material will be measured in tonnes or tons.
Grams relates to tonnes. Carats relates to no other unit of measure except gem stone weight.
The excavator may be involved in commerce, and the purchasers of his excavated material may prefer grams to carats.
One gram in diamond weight equals five carats. Can you do the math? "mg of diamond is called a point.
Depends on the cut shape, but for round diamonds 1 carat is 6.5 mm across. Also 1 carat weighs 200 milligrams
Karat measurements are used for gold, and are not related to diamonds. Karat purity indicates the parts of 24 -- pure gold is 24 karat -- that are gold. Nine, 10, 14 and 18 are common karat purity measurements. Diamonds and pearls are weighed using carats -- one gram equals five carats. Every carat is pure diamond.
The carats tell how pure the gold is. Pure gold is 24 carat. The fraction of 24 carats that the carat count is would be the fraction of gold in a piece of jewelry. For example, 18 karat gold is 75% gold and 12 karat is 50% gold.
diamonds and other fine jewelry
About 80% of all diamonds mined/ excavated are industrial diamonds, with significantly less value that gemstones. Measuring in grams may attempt to acknowledge the commodity value of industrial diamonds, since carats and points as measuring parameters are best applied to gem-stone diamonds.
Carats is a weight measurement for diamond, so your answer depends on how much your diamond weighs. Karats is a purity measurement for gold. Carrots grow in your vegetable garden.
This diamond could weigh about six carats if its measurement is 10mm x 10mm.
Since you only give one measurement, one must assume that it is a girdle diameter measurement. If the stone in question is a round diamond, at this measurement it can be estimated that the diamond weighs between 4 and 5 carats.
If the diamond is a round cut, a stone weighing a little over 3 carats would have the 9.5mm measurement at the girdle.
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.
Carats is a weight measurement for gemstones. A whole gemstone weighs what it weighs, in carats. Carats are usually numbered using 100s, meaning that a diamond may weigh just over one carat and its carat weight is listed as 1.08 carats.
If the diamond is a round brilliant cut, the measurement across the girdle is between 5.9 mm, which weighs approximately .75 carats, and 6.2 mm, which weighs approximately .85 carats. If the diamond is a different cut, there is not enough information in your question to answer it: other cuts require more than one measurement.
If you'd prefer to measure the carat weight of a diamond in a weight measurement other than carats, you can convert the carat weight to grammes. Here's the basic conversion: Five carats weigh 1,000 milligrams. You can complete your own math, depending on the carat weight of the diamond in question.
If the diamond is a round brilliant cut, this measurement at the girdle indicates that it could weigh between .20 carats (3.8 mm) and .25 carats (4.1 mm). If the diamond is of a different cut, a jeweler can remove the diamond and give you the exact carat weight.
The initials dwt may mean diamond weight total. In this case 6.80 is the weight measurement, in carats. The total weight is made up of several stones.
The only factual answer possible is this: one measurement of the diamond is 2.2 mm. If the diamond is a round brilliant cut, it's possible that a diamond of this measurement weighs about .04 carats or 04/100ths of a carat.