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).
2.68 Carat Princess Shape Diamond Actual Size
This page includes a handy photo that gives you the apparent size of a 2.68 carat weight princess shape diamond, when it's actually on a typical woman's hand. The exact size of a 2.68 carat size princess shape diamond will vary depending on the depth of cut, but is usually in the ballpark of around 12.2 mm along one of the straight edges of the diamond.
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 the same as an L 1/2 ring size in Britain or Australia. The visual size of this 2.68 carat weight princess diamond will be affected not only by the carat weight but also on the length to width ratio of the finger the diamond ends up on.
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Diamonds are often magically "bigger" when you place them on a woman's hand; because of this fact, make sure you ask a female shop assistant to try the diamond on instead of putting it on your own male hand.
