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).
2.87 Carat Princess Shape Diamond Sizes on Hand
The exact size of a 2.87 carat weight princess shape diamond depends on other factors such as cut, but is usually in the ballpark of around 19.3 mm along one square edge. To give you more of an idea of what the picture is showing, the ring pictured is a size six in the US sizing system, which is equivalent to an L 1/2 ring size in places like Australia or Britain.
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Don't stress if diamonds and the dollars involved are getting you down - because the diamond will appear larger on her hand, you may not need to spend as much to get your desired effect.
