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 2.13 Carat Diamond

This page provides you with an idea of how large a 2.13 carat size princess shape stone will look when viewed on a typical female hand. A princess shape diamond with a carat size of 2.13 is usually about 7.9 mm long on a side; this can of course vary depending on cut. In order to provide you more of an idea of what's in this image, the ring pictured is a US size 6, which is the same as an L 1/2 ring size in places like Australia or Britain.

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Diamonds almost always look larger when you move them onto a woman's hand - so try to get a woman in the shop to put one on instead of putting it on your hand, which is probably much larger.