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 1.94 Carat Princess Shape Diamond
The picture on this webpage illustrates the approximate size of a 1.94 carat weight princess shape diamond on the thing that will ultimately be important - a female hand. A princess shape stone with a carat weight of 1.94 is usually about 7.7 mm long on the side, although this can depend on the depth of the cut. The size of a female hand vary a lot between women - being in public is evidence enough - so this illustration can only show the apparent diamond size for a typical size ring.
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Digits can be all different sizes, which should factor in to your decision about what shape and size of diamond to get. Don't stress if diamonds and the costs 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.
