Professional Rose Cut Diamond Size Chart & Conversion Tool

MM to CT / CT to MM Rose Cut Shaped Diamond Size Comparison

The Rose Cut Diamond is one of the most historically significant diamonds cuts dating back to the 16th century, when cutting by hand was the norm through the skills of master craftsmen. It has seen a revival due to its old world charm and its distinct features like the lack of pavilion compared to modern cuts. While it certainly lacks in brilliance compared to the brilliant round it makes up for in geometric elegance.

While rose cut diamonds can be made in a variety of different unique shapes, in this chart we will focus on the traditional and popular round variation of the rose cut, with an estimated depth of 30-35% giving quick and easy solution to knowing things like the conversion of a 0.550ct Rose Cut Diamond in MM or vice versa.

0.007 - 0.220 cts

ROSE CUT CARAT WEIGHT	ROSE CUT MM SIZE	ROSE CUT DEPTH MM (30-35%)
0.007 - 0.011 ct.	1.30 - 1.45 mm.	0.30 - 0.40 mm.
0.008 - 0.013 ct.	1.40 - 1.55 mm.	0.40 - 0.45 mm.
0.010 - 0.016 ct.	1.50 - 1.70 mm.	0.45 - 0.55 mm.
0.013 - 0.020 ct.	1.75 - 1.85 mm.	0.50 - 0.60 mm.
0.017 - 0.031 ct.	1.90 - 2.10 mm.	0.60 - 0.70 mm.
0.025 - 0.040 ct.	2.15 - 2.35 mm.	0.65 - 0.80 mm.
0.035 - 0.070 ct.	2.40 - 2.70 mm.	0.75 - 0.85 mm.
0.050 - 0.080 ct.	2.80 - 3.20 mm.	0.90 - 1.00 mm.
0.080 - 0.140 ct.	3.30 - 3.65 mm.	1.00 - 1.20 mm.
0.130 - 0.180 ct.	4.20 - 4.35 mm.	2.20 - 2.60 mm.
0.190 - 0.220 ct.	4.40 - 4.55 mm.	4.70 - 4.80 mm.

Ava Diamonds

0.200 - 1.45 cts

ROSE CUT CARAT WEIGHT	ROSE CUT MM SIZE	ROSE CUT DEPTH MM (30-35%)
0.200 - 0.260 ct.	4.40 - 4.55 mm.	1.35 - 1.55 mm.
0.230 - 0.270 ct.	4.60 - 4.80 mm.	1.40 - 1.65 mm.
0.280 - 0.350 ct.	4.85 - 5.20 mm.	1.50 - 1.80 mm.
0.370 - 0.480 ct.	5.30 - 5.60 mm.	1.55 - 1.90 mm.
0.450 - 0.550 ct.	5.60 - 5.80 mm.	1.65 - 2.00 mm.
0.530 - 0.650 ct.	5.85 - 6.10 mm.	1.75 - 2.10 mm.
0.640 - 0.750 ct.	6.20 - 6.35 mm.	1.80 - 2.20 mm.
0.740 - 0.850 ct.	6.40 - 6.65 mm.	1.90 - 2.27 mm.
0.850 - 0.950 ct.	6.80 - 7.40 mm.	2.10 - 2.40 mm.
0.950 - 1.180 ct.	7.45 - 7.70 mm.	2.20 - 2.60 mm.
1.200 - 1.450 ct.	7.80 - 8.40 mm.	2.40 - 2.80 mm.

Ava Diamonds

What are the Ideal Proportions of Rose Cut Diamonds?

A Rose Cut Diamond does not fall into the norm compared to modern cuts, hence its proportions are dependent on personal choice. The above mentioned rose cut diamond size chart assumes the most traditional and sought-after depth of between 30 to 35%. However, there’s plenty of interest for rose cuts with a higher dome by some consumers.

While we focused here on rounded rose cut diamonds there are numerous fancy cut rose cuts that exist today from pear shaped to ovals and hexagons. All of which have their own appeal but uniquely different ct to mm conversions and vice versa.