Diamond Price Guide - A Diamond Buying Guide
Even if the value of the Kohinoor diamond is not known, it is part of the Crown Jewels, and the whole value of the Crown Jewels is between $10 and $12 billion. The Kohinoor is definitely one of the more expensive diamonds in the collection.
2018 Diamond Price Chart You Should Not Ignore
Even though the price of a diamond increases exponentially with the carat weight, the actual size does not. The table below illustrates the typical size relationship between diamonds of increasing carat weights. Note that when carat weight triples (from 1 to 3 carats), perceived size (represented in the images below) roughly triples as well, however the diameter increases only 45% (from 6.50 to 9.40), and crown area (the surface area visible when the diamond is set) slightly more than doubles.
As comparison the most expensive documented sale of a diamond occurred around 60 years ago, when the Graff pink was sold in Hong Kong for $46 million.
In 1960, the average price for such a diamond stood at some 2,700 U.S
This is important to keep in mind when reviewing diamonds of any shape; a given increase in diameter will yield a larger increase in surface (crown) area and overall perceived size. While the third diamond above has a roughly 50% greater diameter than the first, it certainly appears more than 50% larger.
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Diamond Prices | Diamond Ring and Jewelry Prices
As the carat size of a diamond increases, the diamond's price increases at an increasing rate. Why? Because the larger the diamond, the more increasingly rare it is. Fewer than one in one million mined rough stones are large enough to produce a finished 1 carat diamond. So, as carat weight increases, you will typically pay more not only in total, but on a basis as well. The table below illustrates the typical relationship between diamonds of equal quality and increasing carat weights:
Diamond Prices Continue to Fall - WSJ
Two diamonds of equal carat weight can have very different costs based on other factors (such as , , and ). In understanding the importance of carat weight, know thy partner. If the recipient's heart is set on a certain size diamond, then carat weight will probably be the most important factor in your search until the desired size is attained. At that point, other criteria will take on more importance. Most women can tell you the carat weight and shape of their ideal diamond, and most men can tell you the price.
Selling Diamonds Online for the Best Possible Price
Diamonds are sold by the carat (shown as ct.), which is actually a unit of weight, though most think of a carat in terms of size. The word "carat" comes from the "carob" seed, the original unit of measure for diamond traders. Today, a carat is equal to exactly 0.2 grams (about the weight of a paper clip). Carat weight is unrelated to the similar sounding karat, which refers to gold's purity.