Professional Square Radiant Cut Diamond Size Chart
Square Radiant Shaped Diamond Size Comparison Tool
Ever wondered what a 6mm Radiant Cut is in Carats, or a 5 Carat Radiant is in mm? No need for endless calculations and formulas. Below you will find two charts, covering the Radiant from extremely small pieces, to notably large pieces, with work that was already done for you.
Calling the Radiant Cut Diamond a unique shape is an understatement. It showcases no less than 70 facets and has an outstanding brilliance that cover its entirety, and yet offers the bold style you would often see in the more dramatic step cut shapes.
The following guide covers the carat to mil metre weight calculation of Radiant Cut Diamonds in a wide range of sizes You will also find some recommended guidelines to help narrow down choices and increasing the likelihood of squiring a successful Radiant.
Radiant Cut Diamond CT to MM / MM to CT Conversion Chart
0.04 - 0.77 cts
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| SQUARE RADIANT CUT CARAT WEIGHT | SQUARE RADIANT CUT MM SIZE |
|---|---|
| 0.04 - 0.05 ct. | 1.90 - 2.00 mm. |
| 0.05 - 0.06 ct. | 2.10 - 2.20 mm. |
| 0.07 - 0.08 ct. | 2.30 - 2.40 mm. |
| 0.09 - 0.10 ct. | 2.50 - 2.60 mm. |
| 0.10 - 0.12 ct. | 2.70 - 2.80 mm. |
| 0.13 - 0.15 ct. | 2.90 - 3.00 mm. |
| 0.16 - 0.18 ct. | 3.10 - 3.20 mm. |
| 0.20 - 0.22 ct. | 3.20 - 3.40 mm. |
| 0.23 - 0.26 ct. | 3.50 - 3.60 mm. |
| 0.28 - 0.31 ct. | 3.70 - 3.80 mm. |
| 0.32 - 0.35 ct. | 3.90 - 4.00 mm. |
| 0.38 - 0.40 ct. | 4.10 - 4.20 mm. |
| 0.43 - 0.47 ct. | 4.30 - 4.40 mm. |
| 0.50 - 0.55 ct. | 4.50 - 4.60 mm. |
| 0.55 - 0.58 ct. | 4.70 - 4.80 mm. |
| 0.60 - 0.68 ct. | 4.90 - 5.00 mm. |
| 0.70 - 0.77 ct. | 5.00 - 5.20 mm. |
Ava Diamonds
0.80 - 5.25 cts
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| SQUARE RADIANT CUT CARAT WEIGHT | SQUARE RADIANT CUT MM SIZE |
|---|---|
| 0.80 - 0.88 ct. | 5.10 - 5.30 mm. |
| 0.90 - 0.98 ct. | 5.20 - 5.40 mm. |
| 1.00 - 1.15 ct | 5.50 - 5.60 mm. |
| 1.20 - 1.27 ct | 5.70 - 6.20 mm. |
| 1.30 - 1.45 ct | 6.10 - 6.50 mm. |
| 1.50 - 1.60 ct | 6.20 - 6.60 mm. |
| 1.65 - 1.80 ct | 6.50 - 7.00 mm. |
| 2.00 - 2.30 ct | 6.90 - 7.50 mm. |
| 2.40 - 2.60 ct | 7.40 - 7.90 mm. |
| 2.70 - 2.90 ct | 7.50 - 8.20 mm. |
| 3.00 - 3.30 ct | 7.80 - 8.50 mm. |
| 3.40 - 3.60 ct | 8.30 - 8.70 mm. |
| 3.70 -3.90 ct | 8.50 - 8.90 mm. |
| 4.00 - 4.20 ct | 8.70 - 9.20 mm. |
| 4.40 - 4.70 ct | 9.10 - 9.70 mm. |
| 5.00 - 5.25 ct | 9.20 - 10.00 mm. |
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What are the Ideal Proportions of a Radiant Cut Diamond?
The following guidelines are meant to assist you in establishing a formula to assist you in choosing a Rectangular Cut Diamond that offers the highest return on your investment. It is important to note however, that due to its uniqueness, the Radiant offers multiple choices. The most interesting variants are between the Classic, which focuses primarily on brilliance, vs the modern, which thanks to a larger amount of facets, adds more of a crushed ice look.
What is the Ideal Diamond Depth and Table for the Radiant Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
Table - % | 61% - 69% | 57% - 60% or 70% - 72% | 54% - 56% or 73% - 74% |
Depth - % | 61% - 67% | 59% - 60.9% or 67.1% - 70% | 57% - 58.9% or 70.1% - 74% |
Girdle | Very Thin to - | Slightly Thick | Very Thin to Thick |
Culet | None | Very Small | Small |
What is the Ideal Length to Width Ratio of a Radiant Cut Diamond?
When dealing with Radiant Shaped Diamonds, the length to width ratio is an extremely valuable piece of information that can reveal how square, or how rectangular the stone really is. Of course, combining it with a good old fashioned eye test is equally important. The closer the ratio is to being excellent, the more square the piece will be, and the further it get away from it, its tenancy will be to be more rectangular.
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.00 to | 1.03 | 1.04 - 1.05 |
