Usually stones of this size and larger are simply noted as 'important diamonds', many of which have names.
You can see more important diamonds using the link, below, many of which are smaller than 100 carats.
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A two-millimeter diamond -- round brilliant cut, measured across the girdle -- weighs about .03 carats, and as a loose stone may cost you less than US$100, depending on its colour and clarity. Your diamond would cost less given its smaller size.
0.2 gram diamond is one carat by weight, which is equal to 100 cent. That means 10 cent diamond will be very small diamond which will be weighing only 0.02 gram.
A diamond of this weight -- one carat, is available today on Blue Nile. You can pay between US$2,072 and US$23,403, depending on the cut, clarity, and colour you want for the diamond.
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When you own a diamond of this carat weight, you can name it whatever you like.
Usually individual stones of more than 100 carats are named by the original buyer of the rough stone from which the finished carat weight is more than 100 carats. Generally, they are known as "...large or extraordinary diamonds," according to Wikipedia. Read more, below.
One carat equals 100 in this example. If the diamonds are of equal size, then each diamond weighs 4.5454545 carats.
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Diamond of 2 carats (jewelry grade) can be worth 1,000 to 20,000 dollars more or less. Industrial grade diamonds: From experience, about 25 years ago I saw a 40 carat industrial grade diamond valued at $4,000, $100 dollars a carat. It looked like a dirty piece of quartz.
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.
Your question assumes that the 'biggest' diamond is cut into a round cut, which may not be the case. Most large diamonds are graded according to the carat weight when describing 'biggest', 'largest' and so forth: the largest raw diamond of gemstone quality ever found weighing more than 3,000 carats. Larger diamonds weighing more than 100 carats are rarely cut into round brilliant cuts, so as to preserve the high carat weight of the diamond. You can review the list, below, to determine the characteristics of important diamonds.
Pure gold (more than 99,5 %) or gold alloys. 100 % = 24 carats
Your answer depends on the quantity you want to purchase and in what grade. For example, shopping online today, you can purchase 100 carats of Natural Diamond Powder in 6-12 Micron size and pay about US$200.00.
with respect to gold,bhori & carat are 2 different units.former stands for weight,more technically mass(1 bhori=11.664 grams),while latter stands for purity (24 carats=100%,22carats=22/24 *100=91.66 %,18 carats=18/24*100=75% etc.) with respect to gem stones 5 carats=1 gram(here both are units of weight).
A two-millimeter diamond -- round brilliant cut, measured across the girdle -- weighs about .03 carats, and as a loose stone may cost you less than US$100, depending on its colour and clarity. Your diamond would cost less given its smaller size.