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).

0.77 Carat Princess Shape Size on Hand

Size does not mean much until you see it in context - this article provides a hand as "context" for the apparent size of a 0.77 carat size diamond of princess shape. Carat weight isn't the be all and end all - the depth of the diamond's cut will also influence the apparent size of the rock - for a 0.77 carat princess like this one, the size would be around 5.2 mm typically. If you've got a ring around the house and you know what it's size is, you can compare it to the US size six ring shown in the image on this page - this will assist you in getting a better idea of the diamond size in the picture.

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If you're a male trying to work out the appropriate diamond size to buy for your other half, don't forget that the diamond will usually look a lot bigger on her smaller, more petite hands.