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).
2.91 Carat Princess Shape Size on Hand
This article gives you some concept of how large a 2.91 carat size princess shape diamond will appear when seen on a typical hand of a woman. If you've got a ring in your possession and you know what it's size is, use it to compare with the US size six ring pictured - this will help you get a better idea of the diamond size shown in the photo.
Sponsored Links
Some advice for how to use the information on this page is to initially narrow down your size range, and then to go into stores and actually try a few different sized princess shape diamond rings on, armed with this prior knowledge.
