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 0.75 Carat Princess Shape Diamond Size on Hand

A princess shape diamond with a carat weight of 0.75 is usually about 5.2 mm long on a side, although this can depend on the depth of the cut. To give you more of an idea of what's in this image, the ring shown is a US size 6, which is equivalent to an L 1/2 ring size in Britain or Australia. 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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Later after the diamond is purchased, it's likely you may be pleasantly surprised by how much larger the diamond appears on the female hand, than when viewed by itself .