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).
Actual Diamond Sizes of a 0.19 Carat Princess Shape Diamond
Carat weight does not always mean a lot until you see it in context - this article provides a human hand as "context" to simulate the apparent size of a 0.19 carat weight diamond of princess shape. Carat weight doesn't tell the whole story - the type of cut will also influence the apparent size of the rock; a diamond like this 0.19 carat one will usually be around 3.3 mm .
In order to provide you more of an idea of what the picture is showing, the ring pictured is a size six in the US sizing system, which is equivalent to an L 1/2 ring size in Britain or Australia.
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Pictures can sometimes be notoriously deceptive - this one is pretty clear cut, but don't forget viewing the stone in the flesh may give you a totally different impression of size to examining it on the web.
The visual size of this 0.19 carat princess-shaped diamond will be affected not only by the carat weight but also on the length to width ratio of the finger the diamond ends up on.
