Diamond size estimation from carat weight and shape
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Estimating a diamond's dimensions from its carat weight and shape isn't always straightforward, because different cuts spread weight differently. A 1-carat round brilliant typically measures about 6.5mm, while a 1-carat princess cut is often closer to 5.5mm square. Emerald cuts tend to look larger face-up for their weight due to their open step facets, while deeper cuts like old mine cushions may face up smaller. Knowing the specific cut proportions helps you better visualize the actual size a…