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).
2.45 Carat Princess Shape Diamond Actual Size
This page has a handy photo that gives you the apparent size of a 2.45 carat size princess shape stone, when it's actually on a typical woman's hand. When searching on the web for princess shape diamond sizes, you may notice the numbers will vary slightly - this is because the size (8.8 mm for this particular diamond) depends on things like cut as well.
The illustration in this page shows an L 1/2 ring size; this is around the average size for a female. Fingers that are long and slender will affect how a diamond appears just as much as the carat size of the diamond - so consider other factors as well as the 2.45 carat weight of this princess stone.
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Don't stress if diamonds and the dollars involved are making you worry - because the diamond will appear larger on her hand, you may not need to spend as much to get your desired effect.