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).
Diamond Size on Hand of a 1.21 Carat Diamond
If you're wondering how big a 1.21 carat diamond appears when worn, here's a picture which provides a visual guide to this diamond's size. This 1.21 carat diamond (round shape) has a diameter of about 7.0 mm as shown in the picture.
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The picture shows a ring which is US size 6, which is equivalent to an L 1/2 size in places such as Britain and Australia. Your fingers could be significantly larger or smaller than the fingers shown in the photo, which are quite thin - keep in mind yours probably look quite different.
Go searching for diamonds this size at James Allen by clicking on the banner below and dragging the carat slider to the appropriate setting:
