ROUND
Round brilliants have the most precise, consistent cutting style therefore the dimensions below will be very accurate when based on an excellent cut stone.
0.50 CT (5.5 MM)
0.75 CT (6 MM)
1.0 CT (6.5 MM)
1.25 CT (7.0 MM)
1.50 CT (7.4 MM)
1.75 CT (7.75 MM)
2.0 CT (8.15 MM)
2.25 CT (8.45 MM)
2.75 CT (8.75 MM)
3.0 CT (9.3 MM)
4.0 CT (10.2 MM)
5.0 CT (11 MM)
CUSHION SQUARE
The below examples are based on the hybrid cushion brilliant which offers a large face-up appearance and a crisp sparkle. Shown here are stones with a perfectly square length to width ratio of 1:1.
0.50 CT (4.6 MM)
0.75 CT (5.1 MM)
1.0 CT (5.7 MM)
1.25 CT (6.2 MM)
1.50 CT (6.6 MM)
1.70 CT (7 MM)
2.0 CT (7.4 MM)
2.50 CT (8 MM)
3.0 CT (8.5 MM)
4.0 CT (9 MM)
CUSHION ELONGATED
The below examples are based on the hybrid cushion brilliant which offers a large face-up appearance and a crisp sparkle. Shown here are stones with a rectangular length to width ratio of 1.1:1.
1.0 CT (6.1X5.4)
1.25 CT (6.5X5.8)
1.50 CT (7.1X6.3)
1.75 CT (7.4X6.6)
2.0 CT (7.8X7)
2.50 CT (8.5X7.6)
3.0 CT (9X8.1)
4.0 CT (9.7X8.7)
OVAL
This shape can vary greatly by length to width ratio and its depth percentage. The examples here are based on a desirable length to width ratio of around 1.4:1 and a well-proportioned stone in terms of depth.
1.0 CT (7.8X5.7)
1.25 CT (8.4X6.1)
1.50 CT (9X6.5)
1.70 CT (9.5X6.9)
2.0 CT (10X7.2)
2.25 CT (10.3X7.4)
2.5 CT (10.5X7.6)
3.0 CT (11.4X8.2)
4.0 CT (12.5X9)
PEAR
This cut is elongated by nature and shown here are ones with a desirable length to width ratio of approximately 1.55:1 and well balanced depth/table proportions.
0.75 CT (7.8X5)
1.0 CT (8.9X5.7)
1.25 CT (9.4X6)
1.50 CT (10X6.4)
1.70 CT (10.6X6.8)
2.0 CT (11.1X7.1)
2.50 CT (11.6X7.5)
3.0 CT (12.4X8)
4.0 CT (14X9)
EMERALD
This step cut shape can have varying degrees of length to width ratios within an acceptable range of 1.2:1 for a wider look, and up to a more slender appearance at 1.45:1. Below are examples of stones that fall towards the middle of this range.
0.50 CT (5.2X4)
0.75 CT (6.3X4.8)
1.0 CT (6.8X5.2)
1.25 CT (7.2X5,5)
1.50 CT (7.6X5.8)
1.70 CT (7.9X6.1)
2.0 CT (8.5X6.5)
3.0 CT (9.6X7.3)
4.0 CT (10.6X8.1)
ELONGATED RADIANT
This shape can have varying degrees of length to width ratios within an acceptable range of 1.2:1 for a wider look, and up to a more slender appearance at 1.45. Below are examples of stones that fall towards the middle of this range.
0.50 CT (5.2X4)
1.0 CT (6.8X5.2)
1.25 CT (7.2X5.5)
1.50 CT (7.6X5.8)
1.70 CT (7.9X6.1)
2.0 CT (8.5X6.5)
2.5 CT (9.1X7)
3.0 CT (9.6X7.3)
4.0 CT (10.6X8.1)
PRINCESS
One of the few shapes that are meant to only be square by nature, its sharp corners and fiery sparkle give it a distinct appearance.
0.50 CT (4.5)
0.75 CT (5.1)
1.0 CT (5.6)
1.25 CT (6.0)
1.50 CT (6.4)
2.0 CT (7.0)
3.0 CT (8.1)
MARQUISE
The most elongated of all the shapes, the examples below show marquise stones with length to width ratios of around 1.9:1.
0.50 CT (8.2X4.3)
1.0 CT (10.2X5.3)
1.50 CT (11.7X6.1)
2.0 CT (13X6.8)
HEART
This romantic of shape features a pointed tip and two arches at the top separated by a distinctive cleft.
0.50 CT (5)
1.0 CT (6.4)
2.0 CT (8.2)
ASSCHER
Also known as a square emerald cut, this is the second shape which is truly square by nature. Unlike the princess cut, it features cut corners and step cut faceting.
0.50 CT (4.5)
1.0 CT (5.6)
1.50 CT (6.4)
2.0 CT (7.0)
