How big is a 0.5 carat spinel?
By HeyGema™ · Updated
In short
A 0.5 carat round spinel measures about 5.1 mm across (0.20 inches), 1% narrower than a 0.5 carat diamond (5.1 mm). An oval of the same weight is 6.3 x 4.3 mm and an emerald cut 5.5 x 3.9 mm.
- 5.1 mmround spinel, across
- 0.20 inthe same in inches
- 0.10 gweight
- 31%of a size 6 finger's width
Carat to mm calculator
About 5.1 x 5.1 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
Round
5.1 mm
Oval
6.3 x 4.3 mm
Cushion
4.4 x 4.4 mm
Princess
4.3 x 4.3 mm
Emerald cut
5.5 x 3.9 mm
Asscher
4.3 x 4.3 mm
Radiant
5.1 x 3.9 mm
Pear
6.7 x 4.3 mm
Marquise
8.2 x 4.1 mm
Heart
5.1 x 5.1 mm
Trillion
5.5 x 5.5 mm
Baguette
6.3 x 3.2 mm
= 2 mm in every picture above
0.5 carat spinel size by shape
Face-up measurements of a well-cut 0.5 carat spinel. Spinel is denser than diamond (3.60 against 3.52), so it packs more weight into less space and faces up 1% narrower for the same weight.
- Round
- Length x width: 5.1 mm
- In inches: 0.20 in
- Oval
- Length x width: 6.3 x 4.3 mm
- In inches: 0.25 x 0.17 in
- Cushion
- Length x width: 4.4 x 4.4 mm
- In inches: 0.17 x 0.17 in
- Princess
- Length x width: 4.3 x 4.3 mm
- In inches: 0.17 x 0.17 in
- Emerald cut
- Length x width: 5.5 x 3.9 mm
- In inches: 0.22 x 0.16 in
- Asscher
- Length x width: 4.3 x 4.3 mm
- In inches: 0.17 x 0.17 in
- Radiant
- Length x width: 5.1 x 3.9 mm
- In inches: 0.20 x 0.16 in
- Pear
- Length x width: 6.7 x 4.3 mm
- In inches: 0.26 x 0.17 in
- Marquise
- Length x width: 8.2 x 4.1 mm
- In inches: 0.32 x 0.16 in
- Heart
- Length x width: 5.1 x 5.1 mm
- In inches: 0.20 x 0.20 in
- Trillion
- Length x width: 5.5 x 5.5 mm
- In inches: 0.22 x 0.22 in
- Baguette
- Length x width: 6.3 x 3.2 mm
- In inches: 0.25 x 0.12 in
0.5 carat spinel against other gems
- Diamond
- Round, 0.5 carat: 5.1 mm
- Moissanite
- Round, 0.5 carat: 5.3 mm
- Sapphire
- Round, 0.5 carat: 4.9 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
- Spinel (this page)
- Round, 0.5 carat: 5.1 mm
0.5 carat spinel on a finger
- 4
- Finger width: 14.9 mm
- Round covers: 34%
- Oval covers: 29%
- 5
- Finger width: 15.7 mm
- Round covers: 32%
- Oval covers: 28%
- 6
- Finger width: 16.5 mm
- Round covers: 31%
- Oval covers: 26%
- 7
- Finger width: 17.3 mm
- Round covers: 29%
- Oval covers: 25%
- 8
- Finger width: 18.1 mm
- Round covers: 28%
- Oval covers: 24%
- 9
- Finger width: 18.9 mm
- Round covers: 27%
- Oval covers: 23%
Spinel at nearby weights
- 0.5 ct (this page)
- Round diameter: 5.1 mm
- 1 carat spinel
- Round diameter: 6.4 mm
Questions
A round 0.5 carat spinel is about 5.1 mm across. Other shapes are longer than they are wide: an oval is 6.3 x 4.3 mm.
No. A round 0.5 carat spinel is 1% 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 spinel covers 31% of the width of a size 6 finger. Compare it with a ring you have tried on in the finger chart above.