Forty carats is large for a diamond, and you did not specify a cut, colour or clarity of a stone of this weight.
Research reveals a just-over 40 carat stone, the Polar Star was first owned by Joseph Bonaparte, older brother of Napoleon.It's source is India and this is a Golconda stone (from India). Through history, the stone passed through several hands, and ultimately, Cartier ransomed the stone from a London firm, T M Sutton, a 'pawn shop'.
The latest sale of this stone took place in November 1980 in Geneva, and was purchased for 8 million Swiss francs. At today's exchange rate, that price equals US$8,366.555.57.
You may be able to find a 40 carat diamond for less if you shop around.
A 4 carat diamond ring would be ridiculously expensive. In the $100K mark I would expect. If someone is showing you their 4 carat engagement ring, it is probably cubic zirconia.
A 2 carat diamond cushion cut ring would make a beautiful engagement ring. The price of such a ring would vary from jeweler to jeweler; however, one could expect to pay from around $450 upwards.
The price of a 40-carat diamond with a VVSI clarity and F color can vary significantly based on factors like cut quality and market demand. However, you might expect to pay anywhere from $500,000 to over $1 million for such a diamond. It's essential to consult with a certified gemologist for a precise valuation.
The value of a flawless 0.75 carat diamond can vary greatly depending on factors such as cut quality, color, and clarity. However, as a rough estimate, you can expect to pay anywhere from $2,000 to $6,000 for a high-quality flawless 0.75 carat diamond.
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.
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.
A local jeweler can answer your question, since no two 0.5 carat diamond rings are exactly alike.
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.
A four carat diamond weights four carats. In ounces, this stone would weigh about 0.03 or three one-hundredths of an ounce.
The weight of a carat is equivalent to 200 milligrams, so a two-carat diamond weighs 400 milligrams.
A diamond is valued by its cut, clarity, carat weight and colour. A local jeweler can look at your stone and give you a precise answer.
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.)