WebMar 30, 2024 · Deal Alert: Save 10% off Lab Grown Diamonds at James Allen! In the diamond size chart below, we display the diamond’s diameter mm to carat weight based on averages of round brilliant diamonds. For … WebJan 2, 2024 · The listed wholesale and retail price charts contain Petra Gems' best average estimates based on the data of leading diamond suppliers and online retailers. These price charts are for round cut diamonds. For tips on calculating the prices of fancy-shaped diamonds, check our estimates below.
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