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).
0.69 Carat Diamonds
A diamond that is sized at 0.69 carats is usually roughly 5.76 mm in the width dimension. 0.69 carats specifies a certain size of diamond, but what about all the other properties of the diamond? Seasoned diamond buyers make sure to pay attention to all the properties of the diamond when the searching for that perfect stone, in order to make a balanced purchase which isn't just dominated by size considerations.
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If you're umming and ahhing about whether to get a diamond or another precious gemstone, a relevant piece of information regarding their carat size is that the stones have varied densities, leading to different sizes for stones of the same weight.
Although it is of limited usefulness, a lot of people wonder what the average size of a diamond is (about one third of a carat) when they are searching for a diamond themselves.
It's interesting to note that while the small carat diamond (by small i mean one or two carats) may have only been discovered relatively recently, many of the spectacular large diamonds were found many hundreds of years ago, such as the regent diamond of france which was used by two of the king louis's, with a mighty size of 140 carats. 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 0.69 with a ring which has a total diamond weight of 0.69.
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.