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 0.70 Carat Princess Shape Diamond Size on Hand
The picture shown on this webpage shows the ballpark size of a 0.70 carat size princess shape diamond on the hand of a woman. The precise size of a 0.70 carat weight princess shape diamond depends on other factors such as cut, but is usually in the ballpark of around 5.1 mm along one of the straight edges of the diamond. If you've got a ring around the house and you know the size, use it to compare with the US size six ring shown in the image on this page - this will help you get a better idea of the diamond size shown in the photo.
Some advice for how to use the information on this page is to initially narrow down your size range, and then to go into stores and actually try a few different sized princess shape diamond rings on, armed with this prior knowledge. Digits can vary in terms of their apparent width and breadth, which should influence your decision regarding diamond size and shape.
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Months after you've purchased the diamond, you may be pleasantly surprised by how much larger the diamond appears on the female hand, than when seen in isolation.
