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 0.55 Carat Princess Shape Diamond

This article has a handy illustration showing you the apparent size of a 0.55 carat weight princess shape diamond, when viewed in place on the hand of a woman. The picture on this page shows an L 1/2 ring size; this is around the average size for a female.

Photos can sometimes be a little dependent on the viewer - I've tried to make this one as clear as possible, but don't forget viewing the stone in the flesh may give you a very different impression of size to examining it on the internet.

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Months after you've purchased the diamond, you might be pleasantly surprised by how much larger the diamond appears on the female hand, than when seen in isolation.