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 1.84 Carat Diamond Look Like on a Hand?
The illustration shown here presents the actual diamond size against a hand of a 1.84 carat diamond for a typical woman's hand size. This 1.84 carat round diamond has a diameter of about 8.0 mm which you can see in the image.
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Try and avoid making the mistake I made of looking at a potential diamond engagement ring placed on my own, male finger - remember it's ending up on a usually smaller and more delicate female hand, which will make the diamond appear significantly larger.