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).
0.72 Carat Diamonds
0.72 carats worth of diamond gives you a stone that weighs precisely 144 mg. To help you analyse your various diamond options, one measure you can use is the cost per carat measure.
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The girdle thickness of the diamond plays an important role in determining the apparent size of the diamond - a diamond with an unnecessarily thick girdle will appear smaller than a diamond with a thinner girdle.
Ever looked at a similar carat size of diamond and another gemstone and wondered why the stones appeared so different in size? This is undoubtedly because different types of stones have different specific gravity densities, leading to this discrepancy in size.
You can trade carat size for diamond rarity by doing something like choosing a pink diamond. If you do this, perhaps you'd like to consider putting in a bid for the darya-ye noor diamond which is the largest pink diamond the world, or 182 carats of it. To get it, you'd have to go to iran however.. 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.
No pressure, no diamonds. Thomas Carlyle .