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).
1.92 Carat Diamonds
A diamond with a weight of 1.92 carats is equivalent to a 192 point diamond.
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In looking at the 8.13 mm width of a 1.92 carat diamond, remember that this width can vary quite a bit depending on the depth of the diamond.
Carat weight is not the be all and end all of picking a diamond which looks as big as possible. The diamond's girdle thickness will also play a role in affecting what the diamond looks like.
You don't want a million answers as much as you want a few forever questions. The questions are diamonds you hold in the light. Study a lifetime and you see different colors from the same jewel. Richard Bach .
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. For prospective buyers who are really focused on the size of a stone but not the material or quality, consider changing to a different gemstone apart from diamond. Some other gemstones are significantly less dense than diamond, which means for a certain carat weight they will have a larger volume and hence will look bigger to the naked eye.
A large diamond which has a huge crack down the middle, or alternatively a big yucky looking inclusion, is not a good look - it looks like someone has gone for size and sacrificed all the other desirable properties of the diamond. Clarity, for example, can be just as important in picking a diamond.