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 Sizes of a 2.39 Carat Princess Shape Diamond

This article includes a useful illustration showing you the apparent size of a 2.39 carat size princess shape diamond, when viewed in place on the hand of a woman. The exact size of a 2.39 carat weight princess shape diamond depends on other factors such as cut, but is usually in the ballpark of around 8.4 mm along one square edge. The picture on this page has a ring of L 1/2 ring size; this is around the average size for a female.

Some advice for how to use the information on this page is to initially narrow down your size range; then you can go into stores and try diamonds out in person, armed with this prior knowledge.

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The visual size for this 2.39 carat princess-shaped diamond will depend not just on the carat weight but also on the width to length ratio of the ring finger it is placed on.