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 0.73 Carat Princess Shape Diamond
This page has a handy illustration that gives you the apparent size of a 0.73 carat size princess shape diamond, when it's actually on a typical woman's hand. When searching on the web for princess shape diamond sizes, you may pick up that the numbers are slightly different across different sites - this is because the size (5.2 mm for this particular diamond) depends on things like cut as well.
Fingers that are long and slender will change how a diamond looks as much as the carat size of the diamond - so consider other factors as well as the 0.73 carat weight of this princess stone.
Sponsored Links
Diamonds almost always look larger when you place them on a woman's hand - so try to get a female shop assistant to try the diamond on rather than putting it on your hand, which is probably much larger.