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).
2.25 Carat Diamonds
A diamond that is sized at 2.25 carats is usually roughly 8.58 mm in the width dimension.
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In looking at the 8.58 mm width of a 2.25 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.
If you're considering a number of gemstones, not just diamonds, bear in mind that different types of stone have different densities, so a one carat diamond may appear quite different in size to a one carat emerald.
In the quest for finding the largest diamond possible within a budget, it can be fun to consider famous large diamonds like ashberg diamond, which had a huge weight of 102 carats - about 200 times the mass of a diamond used in a typical engagement ring. So how good do you think a 10 carat diamond which looks a horrible uneven black colour would appear on an engagement ring? Exactly - diamond buyers need to also consider other properties such as the colour of the stone, which is not picked correctly can negate any attractiveness of having a very large diamond.
Don't open your diamonds in a vegetable market. Tie them in bundle and keep them in your heart, and go your own way. Kabir .