Quick and Easy Buying Guide
Carat weight: 1 carat = 200 milligrams = 6.5 mm diameter. Doubling weight doesn't double diameter.
Diamond clarity: FL/IF/VVS/VS = super expensive, near perfect. SI = best value if you can check a photo for obvious inclusions (defects).
Color: D-G = colorless, expensive, only if you have money to burn. H-J = best value. Can go lower in gold metal settings than white metal.
Cut: Better cut ratings let more light into a diamond, making it sparkle more. Very important property, don't skimp here.
Set a budget and minimum cut (Premium). Go J color for gold and I/H for white metals. Go searching for SI1/SI2 clarity diamonds at James Allen. Pick a diamond with small/no inclusions. Choose a ring setting and buy it risk-free (60-day returns).
0.68 Carat Diamonds
0.68 carats in a diamond gets you around 5.73 mm of diamond, give or take. Be careful of assigning too much importance to the carat weight of the diamond while neglecting other properties such as the girdle thickness, which is to wide can make the diamond appear smaller than other diamonds of the same carat weight.
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Although it would seem so, the carat weight of a diamond and the diameter of a diamond have an interesting relationship - as the carat weight of the diamond increases, the diameter of the diamond grows at a much slower speed. Can you tell the difference between a 0.49 and a half carat diamond? Didn't think so. But there can often be quite a significant price difference - so use this fact to your advantage.
Is a handy hint - as well as searching for 0.68 diamonds, try starting your search by examining another property of the diamond, for instance the name of an online jewellery store you would be happy to buy a diamond from. Many people buying a diamond engagement ring for the first time often go overboard with the size of the diamond, not realising how big the diamond will appear when you put it on a small woman's hand.
There are no firm statistics that are universally applicable, but it is generally agreed that the average size of a diamond is around a third of the carat, perhaps a little more. Carat size is only one that property out of a number that you should be considering. You should also consider a diamond other properties such as cut, because this will have a drastic effect on how well the diamond sparkles.
A fine quotation is a diamond on the finger of a witty person, but a pebble in the hands of a fool. Unknown Author .