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 Sizes of a 0.66 Carat Diamond

The image displayed here presents the real diamond size on a hand for a 0.66 carat diamond for a typical woman's hand size. An average round diamond with a 0.66 carat size has a diameter of 5.7 mm, although this can vary slightly if the cut is shallow or deep. The ring shown in the image is a typical size 6 ring, but bear in mind the ring you get could be significantly larger or smaller. Your fingers may be significantly larger or smaller than the fingers shown in the illustration, which are quite thin - be sure to keep this in mind when you're looking at the picture.

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The visual size of the diamond and ring can be affected by whether you have thick or thin fingers, as well as by their length. The apparent size of a diamond depends heavily on what it is shown against - her hand - a tiny hand will make the diamond appear significantly larger and vice versa.

Go searching for diamonds this size at James Allen by clicking on the banner below and dragging the carat slider to the appropriate setting:

Actual Diamond Photos from JamesAllen