The value of a diamond depends on its cut, its clarity, its colour and its carat weight.
A local jeweler can give you the answer you want.
Paragon
i wear a perfect 3 carat diamond ring
I just bought a 0.5 carat diamond ring w/ side stones (.251 carat) from ACME Jewelry for P140,000.00
paragon. you doing the telegraph crossword too?
A diamond of about that carat weight can be bought today on Blue Nile, and you'd pay between US$5,732 and US$23,606, depending on the exact carat weight, cut, clarity and colour that you want.
There is no such thing as a grade seven 5 carat. Diamonds are graded based on clarity, color, cut and carat weight. A round GIA certified 5.01 carat, H color, VS1 clarity diamond is valued at $90,640.
'Perfect' is relative. A diamond is valued by its cut -- mine cut in this case, its carat weight, its clarity and its colour. You can take your stone to a local gemologist who can help you establish a value for this diamond.
The carat defines the standard unit of weight measurement of a diamond.
The largest Flawless, D Colour diamond for sale today on Blue Nile weighs 7.65 carats and sells for US$1,167,550 or US$152,621 per carat. (You can calculate your 10-carat estimate from this per carat value.) You may be able to find a different 'perfect' and differently coloured diamond at an auction house that weighs exactly 10 carats. The diamond could be a Deep Fancy yellow, blue, pink, or other colour. There, the price will be established by the bidders in the room at the time of sale. A deep fancy coloured diamond that is flawless and large will probably cost you more per carat than the D colour diamond, above.
Carat is the measurement of a diamond's weight. The stone's value would partially depend on its carat weight.
A one carat diamond weighs one carat and contains one carat.
A two-carat diamond is a gemstone that weighs two carats.