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 Princess Shape Diamond Sizes on Hand of a 0.52 Carat Diamond

Size does not always mean much until you see it in person - this page provides a human hand as "context" for the apparent size of a 0.52 carat size diamond with a princess shape. If you have got a ring in your possession and you know what it's size is, use it to compare with the US size 6 ring pictured - this will assist you in getting a better idea of the diamond size shown in the photo.

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Don't stress if diamonds and the dollars involved are getting you down; since a diamond will most likely appear bigger on a woman's hand, the diamond size you need may be smaller than you think.