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 Size of a 2.20 Carat Princess Shape Diamond
This page includes a handy illustration showing you the apparent size of a 2.20 carat size princess shape diamond, when viewed in place on the hand of a woman. A princess shape diamond with a carat size of 2.20 is typically about 7.9 mm long on the side; this can of course vary depending on cut. Pictures can sometimes be notoriously deceptive - this one is pretty clear cut, but don't forget viewing the diamond in person will give you a totally different impression of size to examining it on the internet.
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Consider the ratio between the length and width of your finger - this ratio will affect how big and appropriate a diamond appears when it's finally placed on the finger.
