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).
0.33 Carat Princess Shape Size on Hand
Size does not always mean a lot until you witness it in person - this article uses a human hand as "context" for the apparent size of a 0.33 carat weight diamond of princess shape. A princess shape stone with a carat weight of 0.33 is usually about 4.2 mm long on a side, although this can depend on the depth of the cut.
If you have got a ring around the house and you know the size, use it to compare with the US size 6 ring shown in the image on this page - this will help you get a better idea of the diamond size in the picture.
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The size of a female hand vary a lot between women - being in public is evidence enough - so this picture can only show the apparent diamond size for one particular ring size.
The visual size for this 0.33 carat weight princess-shaped diamond will depend not just on the carat weight but as well on the length to width ratio of the finger the diamond ends up on.
Some of my readers are men - if this is you and you're trying to work out the appropriate diamond size to get your other half, don't forget that the diamond will usually appear much larger on her smaller, more petite hands.
