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).
2.16 Carat Diamonds
A diamond which has a size of 2.16 carats is the same as a 216 point diamond. The diameter of a 2.16 carat diamond is approximately 8.46 mm.
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If you like playing with numbers, one analysis method you can use for examining diamonds is to divide the cost of the diamond by the number of carats to get the cost per carat metric. Although it is not a problem for most people, it is possible for a diamond to be too large. This is much more likely to happen with women who have particularly petite hands.
A shop assistant may show you a one carat diamond and a one carat emerald stone next to each other, and point out how much larger the emerald stone is. This is because emerald is a much lighter material, so for a given weight of it, it will appear much bigger than for an equivalent sized diamond. Five small diamonds that add up to one carat are generally not as valuable as a single diamond that weighs one carat, so be short not to compare a single diamond of carat weight 2.16 with a ring which has a total diamond weight of 2.16.
Guard well your spare moments. They are like uncut diamonds. Discard them and their value will never be known. Improve them and they will become the brightest gems in a useful life. Ralph Emerson .
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.