The Koh-i-noor Diamond is not for sale, since it is part of the British Crown Jewels.
However, its size, currently 105.602 carats, means that if it were D colour -- which is a good guess, one like it might sell in the US billion dollar range, or more.
Probably none, because the Koh-i-noor diamond is not for sale, so you would have no proceeds with which to purchase any part of the world.
A diamond rind would cost around $160-$200
Aprox. $450
Your answer depends on the diamond and the point of purchase, and the people involved in the transaction.
Any diamond, at any time, is valued by its carat weight, its colour, its clarity and its cut.
The cost of a diamond necklace really depends on the size that is being looked for, the setting it is going to be in, and the quality of the stone that is wanted.
The cost depends on which gemstone you choose to set in the ring. A diamond of this size would cost you multiple millions of dollars; a semi-precious stone would cost you much less. The most economical choice would be glass or crystal.
998,000,000,000
The money you pay for a diamond depends on its cut, clarity, carat weight and colour. You can spend several hundred dollars or several million dollars for a diamond.
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.
Every diamond is valued by its cut, clarity, colour and carat weight, which together with the price of the metal in the ring would total the cost of a ring -- regardless of the year.
The value of a diamond depends on its cut, colour, carat weight and its clarity. A local jeweler can answer your question.