It depends on the seller and quality but on average it is worth about $196 per carat
Another Answer
According to the link, below, the average purchase price is slightly higher for one carat of black diamond: US$1,015 to US$1,450.
First, understand that if your 'one carat' diamond has '80 points', it may not weigh one carat. Then, take your diamond to a certified gemologist who can tell you 'how much' can be attributed to your diamond.
1 Carat = .2 grams = 100 points
The diamond either weighs 100 points, or a full carat, or it weighs 80 points or 80/100ths of a carat.
If we select top qualities for a white diamond then a 1 carat round cut, H color, Si1 clarity, and excellent cut with GIA certification can cost you approximately $5258. A 1.29 carat cushion cut black diamond can cost upwards of $1,500.
If it is 1 carat weight=.20g .5ct= .10gms and so on you need to know how much it is carat the multiply carat with .20g
too many varibles to answer
To calculate the volume of a 1 carat diamond, we first need to convert the carat weight to grams. Since 1 carat is 200 mg, it is equal to 0.2 grams. The volume of a diamond can vary depending on its shape, so without knowing the specific shape of the diamond, we cannot determine its volume.
A one carat diamond weighs one carat, or .20 grammes.
250 carat Diamond- uncertain amount as can be auctioned; very few diamonds of this size25 carat Diamond- $1 million to $2 million; for a lower quality stone2.5 carat Diamond - $5,000~$8,000Another AnswerYou can buy a 2.5 carat diamond today on Blue Nile and spend from US$12,000 to US$16,000.Also, a 15 carat diamond is available on Blue Nile today for just over US1,000,000.
One carat is equal to 200 milligrams, or in other words, a 5-carat stone weighs 1 gram.
One carat diamond weight is equal to .20 grammes.
One carat of diamond weight equals 0.2 grams. One gram equals 1000 milligrams. Can you do the math?