these days not that much.
Another Answer
Blue Nile is offering a loose stone labeled Marquise cut, 1.01 carat with a Very Good cut, J colour, SI1 clarity for $2,500+. Your indicator 'C' is unfamiliar. Also an 'I' clarity will reduce the value of your stone, since inclusions (flaws) are visible to the naked eye.
Finally, the diamond is only worth what someone will pay you for it.
Every diamond is valued according to its clarity, colour, cut and carat weight. You give the cut: marquise; the colour: I; and the carat weight: one, but the clarity is not stated in your question. Today, on Blue Nile, you can purchase such a diamond, and depending on the clarity that you want, and depending on the exact carat weight and pay between US$2,488 and US$7,435.
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.
Your answer depends on its cut, clarity, colour, and whether or not the weight of the stone you describe is a gemstone or an industrial diamond.
Marquise diamonds are not necessarily cheaper or less expensive than any other cut of diamond of the same clarity, carat weight and colour.
That depends on the cut, carat, color and clarity. For e.g, a round 1 carat D color, IF clarity, and an excellent cut diamond costs about $11, 081 and a 1 carat marquise diamond with the same characteristics costs about $17, 066, both of which are GIA certified. Another example is of a round G color, VS1 clarity, very good cut diamond is for $5521 and a princess diamond with the same characteristics is for $4391. So it all depends on what you are looking for and what your budget is.
That depends on the cut, carat, color and clarity. For e.g, a round 1 carat D color, IF clarity, and an excellent cut diamond costs about $11, 081 and a 1 carat marquise diamond with the same characteristics costs about $17, 066, both of which are GIA certified. If you have any questions, you can get in touch with us via www.dubaiwholesalediamonds.com/enquiry.
A two-carat diamond is a gemstone that weighs two carats.
A diamond is valued by its cut, clarity, carat weight and colour. A local jeweler can show you a stone in your price range.
Any diamond is worth whatever someone will pay you for it. Today, on Blue Nile, you can purchase a diamond of this cut and pay between US$2,752 and US$17,748 , depending on the colour, clarity and exact carat weight that you want. Best practices dictate that you take your gemstone to a certified gemologist and pay for a certificate documenting its characteristics. This will guide you in establishing a value for your diamond.
Any diamond is worth whatever someone will pay you for it. Today, on Blue Nile, you can purchase a diamond of this carat weight and pay between US$848 and US$3,103 , depending on the colour and clarity 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.
Twenty carats is large for a diamond gemstone. You may find the one you want to buy at an auction house. Depending on the colour, cut and clarity, a diamond of this carat weight. You should expect to pay several million dollars US. (For example: Today at Blue Nile, you can buy a 16+ carat diamond, and spend US$600,000+, or a 14+ carat diamond, and spend US$1,500,000 -- the difference being the clarity of the diamonds.)