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).
0.75 Carat Diamonds
Diamonds that weigh 0.75 carats are typically 5.92 mm across their widest part. This average width of 5.92 mm for a 0.75 carat diamond only tells some of the story, because this width is variable depending on how deep or shallow the diamond shape is.
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A way of using numbers to help you compare diamonds is to calculate the cost per carat of diamond. How big a diamond appears does not scale linearly with the carat weight of the diamond, which catches many people out.
Odd carat weights are carat weights which don't form round numbers, for example 1.97. Often diamonds with odd carat weights are quite a bit cheaper than diamonds with round number carat weights.
Pressure makes diamonds. George S. Patton .
Diamond carat size doesn't narrow down your list of diamonds very much, what you really need to do is consider what the other desirable properties of the diamond, decide how good these properties have to be for your situation, and then search for diamonds which meet all of these property requirements at the same time. People say the four cs for a reason - diamond carat size is just one of the four cs and the others are arguably just as important in determining how 'attractive' and 'good' a diamond is.
