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).

0.64 Carat Princess Shape Diamond Actual Size

This article has a handy illustration that gives you the apparent size of a 0.64 carat size princess shape stone, when it's actually on a typical woman's hand. When searching on the web for princess shape diamond sizes, you may notice the numbers are slightly different across different sites - this is because the size (5.1 mm for this 0.64 carat diamond) can depend on the cut, not just the carat weight.

The illustration in this page shows an L 1/2 ring size; this is around the average size for a female.

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Fingers that are long and slender will change how a diamond looks as much as the carat size of the diamond - so look beyond just considering the 0.64 carat weight of this princess stone. Months after you've purchased the diamond, you may be pleasantly surprised because the diamond appears larger on a woman's hand than you first thought, compared with when viewed by itself .