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).
0.85 Carat Princess Shape Diamond Actual Size
This article provides you with some concept of how big a 0.85 carat size princess shape diamond will appear when viewed on a typical hand of a woman. Carat weight isn't the be all and end all - the depth of the diamond's cut will also influence the apparent size of the rock; a diamond like this 0.85 carat one will usually be around 5.3 mm .
While this picture will give you an approximate idea of how large a diamond will seem when viewed on the female hand, remember that the size of the ring you pick or need may be significantly larger or smaller than the size 6 in the picture.
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The size of a female hand vary a lot between women - just look around you when you're next in public - so this picture can only provide the apparent diamond size for a typical size ring. Fingers can vary in terms of their apparent width and breadth, which should influence your decision regarding diamond size and shape.
Later after the diamond is purchased, it's likely you may be pleasantly surprised because the diamond appears larger on a woman's hand than you first thought, compared with when seen in isolation.