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RESOURCES

Care & Cleaning

MOISSANITE CARAT SIZES

Carat is a standard measurement of weight of precious gems. Most of us have heard of CARAT in conjunction with diamond weight as it is a rough indication of a gem's physical size. The lower the carat, the smaller the gem and lower price while higher carat means bigger gem and a higher price.  

Moissanite is 18% lighter than diamond, so one carat of a moissanite weighs between 166-170 mg which translates to 0.83 - 0.85 carat of diamond equivalent weight (DWE). To express DEW, moissanite is cut to physical measurements that of an ideal cut diamond. So this means that a one (1.00) carat moissanite weights 0.83 - 0.85 carat DEW, but still measures 6.5 mm in diameter (round) making both one (1.00) carat diamond and one (1.00) carat moissanite visually appear as the same exact size. For this reason, moissanite size is expressed in mm rather than in carat.  Here is a list of the most common moissanite shapes along side with their mesurments in mm and diamond equivalent weight.

ROUND

MM

DEW CT

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

9.5

10.0

10.5

11.0

11.5

12.0

12.5

13.0

13.5

14.0

15.0

16.0

0.10

0.16

0.23

0.33

0.48

0.60

0.78

1.00

1.25

1.50

1.95

2.25

2.65

3.10

3.64

4.25

4.85

5.45

6.10

7.25

7.89

9.50

9.86

12.90

16.05

CUSHION

MM

DEW CT

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

9.5

10.0

10.5

11.0

11.5

12.0

0.33

0.50

0.60

0.80

1.11

1.30

1.70

2.00

2.40

2.80

3.30

4.20

5.00

5.80

6.60

7.00

8.00

PILLOW

MM

DEW CT

7x6

8x6

8x7

9x7

9x8

10x8

10x9

11x8

11x9

12x9

12x10

1.30

1.60

2.00

2.40

2.80

3.20

3.60

4.10

5.00

5.70

6.50

PEAR

MM

DEW CT

3x2

5x3

6x4

7x5

8x5

8x6

9x6

9x7

10x7

10.5x7

10x8

11x8

12x8

13x8

14x10

15x10

0.13

0.25

0.42

0.75

0.90

1.20

1.50

1.80

2.10

2.40

2.60

3.00

3.50

5.20

7.10

7.35

MARQUISE

MM

DEW CT

4x2

5x25

6x3

7x3.5

8x4

9x4.5

10x5

11x5.5

12x6

13x6.5

14x7

16x8

0.07

0.13

0.23

0.35

0.50

0.70

1.00

1.40

1.80

2.20

2.80

3.86

OVALS

MM

DEW CT

5x3

6x4

7x5

8x5

8x6

9x6

9x7

10x7

10x8

11x8

11x9

12x8

12x10

13x9

14x10

15x10

0.26

0.49

0.96

1.40

1.52

1.70

2.19

2.50

3.11

3.50

4.28

4.70

5.93

5.80

7.10

8.20

PRINCESS

MM

DEW CT

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

9.5

10.0

10.5

11.0

11.5

12.0

13.0

14.0

0.40

0.50

0.75

1.00

1.20

1.50

2.00

2.50

3.00

3.50

4.00

5.00

5.60

6.00

7.50

9.00

9.50

10.50

12.00

ELONGATED RADIANT

MM

DEW CT

4x2

5x3

6x3

6x4

7x5

8x4

8x6

9x7

10x8

11x9

12x10

14x10

0.20

0.30

0.50

0.70

1.20

1.50

1.80

2.70

3.80

5.20

7.20

8.90

SQUARE RADIANT

MM

DEW CT

0.18

0.50

0.75

1.00

1.25

1.50

2.00

2.50

3.00

3.50

4.00

5.60

7.50

9.25

3.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

10.0

11.0

12.0

HEART

MM

DEW CT

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

9.5

10.0

11.0

12.0

0.23

0.33

0.50

0.60

0.80

1.00

1.20

1.50

1.80

2.20

2.70

3.10

3.40

4.85

5.80

TRILLION

MM

DEW CT

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

9.5

10.0

11.00

12.00

13.00

0.23

0.33

0.50

0.60

0.80

1.00

1.20

1.50

1.80

2.20

2.70

3.10

3.40

4.85

5.80

6.42

BAGUETTE

MM

DEWCT

2.5x1.5

3.5x1.5

4x2

5x2.5

4x3x2

5x3x2

0.06

0.07

0.09

0.14

0.21

0.25

EMERALD

MM

DEW CT

4x2

5x3

6x4

7x5

8x6

9x7

10x8

11x9

12x10

14x10

0.10

0.27

0.60

1.20

1.90

2.80

4.00

5.00

6.50

7.60

ASSCHER

MM

DEW CT

3.0

4.0

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

9.5

10.0

11.0

12.0

0.40

0.65

0.75

1.00

1.30

1.60

1.80

2.30

2.70

3.20

3.90

4.40

5.30

7.00

9.25

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