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).
What Does a 0.13 Carat, Princess Shape Diamond Look Like on a Hand?
This page gives you some concept of how large a 0.13 carat weight princess shape diamond will look when seen on the female hand. The exact size of a 0.13 carat size princess shape diamond depends on other factors such as cut, but is usually in the ballpark of around 2.8 mm along one of the straight edges of the diamond.
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In order to provide you more of an idea of what's in this image, 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.
