How big is a 1 carat emerald?
By HeyGema™ · Updated
In short
A 1 carat round emerald measures about 7.0 mm across (0.28 inches), 9% wider than a 1 carat diamond (6.5 mm). An oval of the same weight is 8.7 x 6.0 mm and an emerald cut 7.6 x 5.4 mm.
- 7.0 mmround emerald, across
- 0.28 inthe same in inches
- 0.20 gweight
- 43%of a size 6 finger's width
Carat to mm calculator
About 7.0 x 7.0 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
Round
7.0 mm
Oval
8.7 x 6.0 mm
Cushion
6.1 x 6.1 mm
Princess
6.0 x 6.0 mm
Emerald cut
7.6 x 5.4 mm
Asscher
6.0 x 6.0 mm
Radiant
7.1 x 5.4 mm
Pear
9.3 x 6.0 mm
Marquise
11.3 x 5.7 mm
Heart
7.1 x 7.1 mm
Trillion
7.6 x 7.6 mm
Baguette
8.7 x 4.4 mm
= 2 mm in every picture above
1 carat emerald size by shape
Face-up measurements of a well-cut 1 carat emerald. Emerald is lighter than diamond (2.72 against 3.52), so the same weight gives a bigger stone, 9% wider across.
- Round
- Length x width: 7.0 mm
- In inches: 0.28 in
- Oval
- Length x width: 8.7 x 6.0 mm
- In inches: 0.34 x 0.24 in
- Cushion
- Length x width: 6.1 x 6.1 mm
- In inches: 0.24 x 0.24 in
- Princess
- Length x width: 6.0 x 6.0 mm
- In inches: 0.24 x 0.24 in
- Emerald cut
- Length x width: 7.6 x 5.4 mm
- In inches: 0.30 x 0.21 in
- Asscher
- Length x width: 6.0 x 6.0 mm
- In inches: 0.24 x 0.24 in
- Radiant
- Length x width: 7.1 x 5.4 mm
- In inches: 0.28 x 0.21 in
- Pear
- Length x width: 9.3 x 6.0 mm
- In inches: 0.36 x 0.24 in
- Marquise
- Length x width: 11.3 x 5.7 mm
- In inches: 0.45 x 0.22 in
- Heart
- Length x width: 7.1 x 7.1 mm
- In inches: 0.28 x 0.28 in
- Trillion
- Length x width: 7.6 x 7.6 mm
- In inches: 0.30 x 0.30 in
- Baguette
- Length x width: 8.7 x 4.4 mm
- In inches: 0.34 x 0.17 in
1 carat emerald against other gems
- Diamond
- Round, 1 carat: 6.5 mm
- Moissanite
- Round, 1 carat: 6.6 mm
- Sapphire
- Round, 1 carat: 6.2 mm
- Ruby
- Round, 1 carat: 6.2 mm
- Aquamarine
- Round, 1 carat: 7.0 mm
- Morganite
- Round, 1 carat: 7.0 mm
- Tanzanite
- Round, 1 carat: 6.6 mm
- Topaz
- Round, 1 carat: 6.4 mm
- Emerald (this page)
- Round, 1 carat: 7.0 mm
1 carat emerald on a finger
- 4
- Finger width: 14.9 mm
- Round covers: 47%
- Oval covers: 40%
- 5
- Finger width: 15.7 mm
- Round covers: 45%
- Oval covers: 38%
- 6
- Finger width: 16.5 mm
- Round covers: 43%
- Oval covers: 36%
- 7
- Finger width: 17.3 mm
- Round covers: 41%
- Oval covers: 35%
- 8
- Finger width: 18.1 mm
- Round covers: 39%
- Oval covers: 33%
- 9
- Finger width: 18.9 mm
- Round covers: 37%
- Oval covers: 32%
Emerald at nearby weights
- 0.5 carat emerald
- Round diameter: 5.6 mm
- 1 ct (this page)
- Round diameter: 7.0 mm
- 1.5 carat emerald
- Round diameter: 8.0 mm
Questions
A round 1 carat emerald is about 7.0 mm across. Other shapes are longer than they are wide: an oval is 8.7 x 6.0 mm.
Yes. A round 1 carat emerald is 9% wider than a 1 carat diamond (6.5 mm).
0.20 grams. A carat is 200 milligrams for every gem.
A round 1 carat emerald covers 43% of the width of a size 6 finger. Compare it with a ring you have tried on in the finger chart above.