How big is a 0.5 carat sapphire?
By HeyGema™ · Updated
In short
A 0.5 carat round sapphire measures about 4.9 mm across (0.19 inches), 4% narrower than a 0.5 carat diamond (5.1 mm). An oval of the same weight is 6.1 x 4.2 mm and an emerald cut 5.3 x 3.8 mm.
- 4.9 mmround sapphire, across
- 0.19 inthe same in inches
- 0.10 gweight
- 30%of a size 6 finger's width
Carat to mm calculator
About 4.9 x 4.9 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
Round
4.9 mm
Oval
6.1 x 4.2 mm
Cushion
4.3 x 4.3 mm
Princess
4.2 x 4.2 mm
Emerald cut
5.3 x 3.8 mm
Asscher
4.2 x 4.2 mm
Radiant
4.9 x 3.8 mm
Pear
6.5 x 4.2 mm
Marquise
7.9 x 4.0 mm
Heart
4.9 x 4.9 mm
Trillion
5.3 x 5.3 mm
Baguette
6.1 x 3.0 mm
= 2 mm in every picture above
0.5 carat sapphire size by shape
Face-up measurements of a well-cut 0.5 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: 4.9 mm
- In inches: 0.19 in
- Oval
- Length x width: 6.1 x 4.2 mm
- In inches: 0.24 x 0.16 in
- Cushion
- Length x width: 4.3 x 4.3 mm
- In inches: 0.17 x 0.17 in
- Princess
- Length x width: 4.2 x 4.2 mm
- In inches: 0.16 x 0.16 in
- Emerald cut
- Length x width: 5.3 x 3.8 mm
- In inches: 0.21 x 0.15 in
- Asscher
- Length x width: 4.2 x 4.2 mm
- In inches: 0.16 x 0.16 in
- Radiant
- Length x width: 4.9 x 3.8 mm
- In inches: 0.19 x 0.15 in
- Pear
- Length x width: 6.5 x 4.2 mm
- In inches: 0.25 x 0.16 in
- Marquise
- Length x width: 7.9 x 4.0 mm
- In inches: 0.31 x 0.16 in
- Heart
- Length x width: 4.9 x 4.9 mm
- In inches: 0.19 x 0.19 in
- Trillion
- Length x width: 5.3 x 5.3 mm
- In inches: 0.21 x 0.21 in
- Baguette
- Length x width: 6.1 x 3.0 mm
- In inches: 0.24 x 0.12 in
0.5 carat sapphire against other gems
- Diamond
- Round, 0.5 carat: 5.1 mm
- Moissanite
- Round, 0.5 carat: 5.3 mm
- Ruby
- Round, 0.5 carat: 4.9 mm
- Emerald
- Round, 0.5 carat: 5.6 mm
- Aquamarine
- Round, 0.5 carat: 5.6 mm
- Morganite
- Round, 0.5 carat: 5.5 mm
- Tanzanite
- Round, 0.5 carat: 5.2 mm
- Topaz
- Round, 0.5 carat: 5.1 mm
- Sapphire (this page)
- Round, 0.5 carat: 4.9 mm
0.5 carat sapphire on a finger
- 4
- Finger width: 14.9 mm
- Round covers: 33%
- Oval covers: 28%
- 5
- Finger width: 15.7 mm
- Round covers: 31%
- Oval covers: 27%
- 6
- Finger width: 16.5 mm
- Round covers: 30%
- Oval covers: 25%
- 7
- Finger width: 17.3 mm
- Round covers: 28%
- Oval covers: 24%
- 8
- Finger width: 18.1 mm
- Round covers: 27%
- Oval covers: 23%
- 9
- Finger width: 18.9 mm
- Round covers: 26%
- Oval covers: 22%
Sapphire at nearby weights
- 0.5 ct (this page)
- Round diameter: 4.9 mm
- 1 carat sapphire
- Round diameter: 6.2 mm
Questions
A round 0.5 carat sapphire is about 4.9 mm across. Other shapes are longer than they are wide: an oval is 6.1 x 4.2 mm.
No. A round 0.5 carat sapphire is 4% narrower than a 0.5 carat diamond (5.1 mm).
0.10 grams. A carat is 200 milligrams for every gem.
A round 0.5 carat sapphire covers 30% of the width of a size 6 finger. Compare it with a ring you have tried on in the finger chart above.