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).
2.89 Carat Actual Size (Princess Shape)
Carat weight does not always mean much until you witness it in person - this page uses a hand as "context" to simulate the apparent size of a 2.89 carat weight diamond with a princess shape. The precise size of a 2.89 carat size princess shape diamond will vary depending on the depth of cut, but will typically be around 20.4 mm along one square edge. If you've got a ring in your possession and you know what it's size is, use it to compare with the US size six ring pictured - this will help you get a better idea of the diamond size shown in the photo.
Pictures can sometimes be notoriously deceptive - this one is pretty clear cut, but don't forget seeing the stone in person may give you a very different impression of size to viewing it on the web. The apparent size of this 2.89 carat princess-shaped diamond will depend not just on the carat weight but as well on the length to width ratio of the ring finger the diamond ends up on.
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Later after the diamond is purchased, it's likely you may be pleasantly surprised by how much larger the diamond appears on the female hand, than when seen in isolation.
