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).
0.17 Carat Diamonds
To convert the weight of this diamond in carats to milligrams, you multiply the number of carats by 200, in this case multiplying 0.17 carats by 200 to get 34 mg. The shallowness of a diamond, which depends on how the diamond has been cut, will affect the relationship between carat weight and diameter of the diamond - because of this reason, 0.17 carat diamonds will only average a width of 3.59 mm, but will not always be precisely this width.
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Next to sound judgment, diamonds and pearls are the rarest things in the world. Jean de la Bruyere .
Savvy diamond buyers have learnt to search for diamonds that do not have round numbers in their carat weight - for example, these buyers will search for a diamond with the carat weight just below one or two carats.
If you found this page, you probably were searching for something like a 0.17 diamond. The problem is there are thousands of pages with information on 0.17 diamonds, so to narrow down your search try adding other terms such as whether you want a premium, ideal or good cut of diamond. Although it is of limited usefulness, a lot of people wonder what the average size of a diamond is (about one third of a carat) when they are searching for a diamond themselves.
If you're in a store and you've found a ring which you're interested in, but only the total diamond weight is marked, don't hesitate to ask a shop assistant. They should give you the individual diamond weights, and if they don't just walk away - it's not worth your time dealing with unscrupulous sellers.
Carat size is only one that property out of a number that you should be considering. You should also consider a diamond other properties such as cut, because this will have a drastic effect on how well the diamond sparkles.