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).

Actual Diamond Size of a 0.68 Carat Princess Shape Diamond

Carat weight doesn't always mean much until you witness it in context - this article provides a hand as "context" to simulate the apparent size of a 0.68 carat size diamond with a princess shape. If you search around on the web to find the actual size of a 0.68 carat weight princess shape diamond, you may pick up that the numbers are slightly different across different sites - this is due to the fact that the size (5.1 mm for this 0.68 carat diamond) depends on things like cut as well.

If you have got a ring in your possession and you know the size, use it to compare with the US size 6 ring shown in the image on this page - this will assist you in getting a better idea of the diamond size in the picture. Pictures can sometimes be notoriously deceptive - this one is pretty clear cut, but don't forget seeing the diamond in the flesh may give you a very different judgement of size to viewing it on the web.

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Consider the ratio between the length and width of a finger - this ratio can play an important role in how large and appropriate a diamond appears when it's slipped in a ring onto the hand.