How big is a 2 carat sapphire?
By HeyGema™ · Updated
In short
A 2 carat round sapphire measures about 7.8 mm across (0.31 inches), 4% narrower than a 2 carat diamond (8.1 mm). An oval of the same weight is 9.7 x 6.6 mm and an emerald cut 8.5 x 6.0 mm.
- 7.8 mmround sapphire, across
- 0.31 inthe same in inches
- 0.40 gweight
- 47%of a size 6 finger's width
Carat to mm calculator
About 7.8 x 7.8 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
Round
7.8 mm
Oval
9.7 x 6.6 mm
Cushion
6.8 x 6.8 mm
Princess
6.6 x 6.6 mm
Emerald cut
8.5 x 6.0 mm
Asscher
6.6 x 6.6 mm
Radiant
7.8 x 6.0 mm
Pear
10.3 x 6.6 mm
Marquise
12.6 x 6.3 mm
Heart
7.8 x 7.8 mm
Trillion
8.5 x 8.5 mm
Baguette
9.7 x 4.8 mm
= 5 mm in every picture above
2 carat sapphire size by shape
Face-up measurements of a well-cut 2 carat sapphire. Sapphire is denser than diamond (4.00 against 3.52), so it packs more weight into less space and faces up 4% narrower for the same weight.
- Round
- Length x width: 7.8 mm
- In inches: 0.31 in
- Oval
- Length x width: 9.7 x 6.6 mm
- In inches: 0.38 x 0.26 in
- Cushion
- Length x width: 6.8 x 6.8 mm
- In inches: 0.27 x 0.27 in
- Princess
- Length x width: 6.6 x 6.6 mm
- In inches: 0.26 x 0.26 in
- Emerald cut
- Length x width: 8.5 x 6.0 mm
- In inches: 0.33 x 0.24 in
- Asscher
- Length x width: 6.6 x 6.6 mm
- In inches: 0.26 x 0.26 in
- Radiant
- Length x width: 7.8 x 6.0 mm
- In inches: 0.31 x 0.24 in
- Pear
- Length x width: 10.3 x 6.6 mm
- In inches: 0.40 x 0.26 in
- Marquise
- Length x width: 12.6 x 6.3 mm
- In inches: 0.49 x 0.25 in
- Heart
- Length x width: 7.8 x 7.8 mm
- In inches: 0.31 x 0.31 in
- Trillion
- Length x width: 8.5 x 8.5 mm
- In inches: 0.33 x 0.33 in
- Baguette
- Length x width: 9.7 x 4.8 mm
- In inches: 0.38 x 0.19 in
2 carat sapphire against other gems
- Diamond
- Round, 2 carat: 8.1 mm
- Moissanite
- Round, 2 carat: 8.4 mm
- Ruby
- Round, 2 carat: 7.8 mm
- Emerald
- Round, 2 carat: 8.9 mm
- Aquamarine
- Round, 2 carat: 8.9 mm
- Morganite
- Round, 2 carat: 8.8 mm
- Tanzanite
- Round, 2 carat: 8.3 mm
- Topaz
- Round, 2 carat: 8.1 mm
- Sapphire (this page)
- Round, 2 carat: 7.8 mm
2 carat sapphire on a finger
- 4
- Finger width: 14.9 mm
- Round covers: 52%
- Oval covers: 45%
- 5
- Finger width: 15.7 mm
- Round covers: 50%
- Oval covers: 42%
- 6
- Finger width: 16.5 mm
- Round covers: 47%
- Oval covers: 40%
- 7
- Finger width: 17.3 mm
- Round covers: 45%
- Oval covers: 38%
- 8
- Finger width: 18.1 mm
- Round covers: 43%
- Oval covers: 37%
- 9
- Finger width: 18.9 mm
- Round covers: 41%
- Oval covers: 35%
Sapphire at nearby weights
- 1.5 carat sapphire
- Round diameter: 7.1 mm
- 2 ct (this page)
- Round diameter: 7.8 mm
- 3 carat sapphire
- Round diameter: 8.9 mm
Questions
A round 2 carat sapphire is about 7.8 mm across. Other shapes are longer than they are wide: an oval is 9.7 x 6.6 mm.
No. A round 2 carat sapphire is 4% narrower than a 2 carat diamond (8.1 mm).
0.40 grams. A carat is 200 milligrams for every gem.
A round 2 carat sapphire covers 47% of the width of a size 6 finger. Compare it with a ring you have tried on in the finger chart above.