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).
2.30 Carat Diamonds
Some online retailers provide, amongst other diamond properties, a property called the cost per carat, which gives consumers another way of thinking about the value of a diamond.
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How big a diamond appears does not scale linearly with the carat weight of the diamond, which catches many people out.
Love isn't perfect. Even diamonds start as coal. Brandon Boyd .
A half carat diamond is a typical size for the average diamond engagement ring, but of course sizes can vary hugely between couples, depending on economic status and personal preference. 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.