Today, on Blue Nile, the smallest diamond weighs .23 carats and is available for US$270.
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.
The weight of a carat is equivalent to 200 milligrams, so a two-carat diamond weighs 400 milligrams.
The diamond either weighs 100 points, or a full carat, or it weighs 80 points or 80/100ths of a carat.
Two tenth carat isn't a term usually associated with a diamond. Every diamond is priced according to its carat weight, its colour, its cut and its clarity.
Today on Blue Nile, you can purchase a one carat SI1 diamond and pay about US$4,759; and a one carat VVS1 diamond and pay about US$12,252.
Every diamond is valued by its cut, colour, clarity and carat weight. A diamond this large is rare: you may be able to find a comparable carat weight diamond in an auction catalog from Sothebys or Christies.
The carat weight 0.02 in reference to a diamond means that this diamond weighs oh two-one-hundredths of a carat. This equals 0.00014110 ounces.
its expensive
£2
A one-half carat diamond weighs 100 milligrams = 0.10 gram.
The value of a diamond depends on its cut, colour, carat weight and its clarity. A local jeweler can answer your question.
Your answer depends entirely on the diamond, its cut, carat weight, clarity and colour.