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).
0.89 Carat Diamonds
When you see a 0.89 carat diamond, expect to see about 6.28 mm worth of diamond. In evaluating the value of a 0.89 carat diamond, one thing you can do is work out the precise cost per carat of diamond.
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Girdle thickness is a diamond property which many people never even think about, but which can critically affect how big the diamond appears to be.
Big girls need big diamonds. Liz Taylor .
The apparent size of a diamond does not increase at the same rate as the diamond's carat size, leading to confusion quite often in stores.
Odd carat weights are carat weights which don't form round numbers, for example 1.97. Often diamonds with odd carat weights are quite a bit cheaper than diamonds with round number carat weights.
There are hundreds of thousands of diamonds available online, which can be quite a daunting prospect if you're trying to narrow your choices down. One tip is to add another property of the diamond to the phrase that you're entering into your web browser - you could enter vs1 clarity alongside 0.89 carat diamonds. God forbid that this should be a problem for anyone, but it may be that the diamond, once it actually put on the fiance's hand, may appear to be too big and unwieldy. Make sure to take this into account when you're shopping around.
In terms of diamond properties, the carat weight of the diamond should be considered alongside the many other characteristics of the diamond, in order to find a diamond which is balanced and hence not let down by being of poor quality in one of these departments.