How big is a 10 carat spinel?
By HeyGema™ · Updated
In short
A 10 carat round spinel measures about 13.8 mm across (0.54 inches), 1% narrower than a 10 carat diamond (13.9 mm). An oval of the same weight is 17.1 x 11.8 mm and an emerald cut 15.0 x 10.7 mm.
- 13.8 mmround spinel, across
- 0.54 inthe same in inches
- 2.00 gweight
- 84%of a size 6 finger's width
Carat to mm calculator
About 13.8 x 13.8 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
Round
13.8 mm
Oval
17.1 x 11.8 mm
Cushion
12.0 x 12.0 mm
Princess
11.8 x 11.8 mm
Emerald cut
15.0 x 10.7 mm
Asscher
11.8 x 11.8 mm
Radiant
13.9 x 10.7 mm
Pear
18.2 x 11.8 mm
Marquise
22.2 x 11.1 mm
Heart
13.9 x 13.9 mm
Trillion
15.0 x 15.0 mm
Baguette
17.1 x 8.6 mm
= 5 mm in every picture above
10 carat spinel size by shape
Face-up measurements of a well-cut 10 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: 13.8 mm
- In inches: 0.54 in
- Oval
- Length x width: 17.1 x 11.8 mm
- In inches: 0.67 x 0.46 in
- Cushion
- Length x width: 12.0 x 12.0 mm
- In inches: 0.47 x 0.47 in
- Princess
- Length x width: 11.8 x 11.8 mm
- In inches: 0.46 x 0.46 in
- Emerald cut
- Length x width: 15.0 x 10.7 mm
- In inches: 0.59 x 0.42 in
- Asscher
- Length x width: 11.8 x 11.8 mm
- In inches: 0.46 x 0.46 in
- Radiant
- Length x width: 13.9 x 10.7 mm
- In inches: 0.55 x 0.42 in
- Pear
- Length x width: 18.2 x 11.8 mm
- In inches: 0.72 x 0.46 in
- Marquise
- Length x width: 22.2 x 11.1 mm
- In inches: 0.88 x 0.44 in
- Heart
- Length x width: 13.9 x 13.9 mm
- In inches: 0.55 x 0.55 in
- Trillion
- Length x width: 15.0 x 15.0 mm
- In inches: 0.59 x 0.59 in
- Baguette
- Length x width: 17.1 x 8.6 mm
- In inches: 0.67 x 0.34 in
10 carat spinel against other gems
- Diamond
- Round, 10 carat: 13.9 mm
- Moissanite
- Round, 10 carat: 14.3 mm
- Sapphire
- Round, 10 carat: 13.3 mm
- Ruby
- Round, 10 carat: 13.3 mm
- Emerald
- Round, 10 carat: 15.1 mm
- Aquamarine
- Round, 10 carat: 15.2 mm
- Morganite
- Round, 10 carat: 15.0 mm
- Tanzanite
- Round, 10 carat: 14.1 mm
- Spinel (this page)
- Round, 10 carat: 13.8 mm
10 carat spinel on a finger
- 4
- Finger width: 14.9 mm
- Round covers: 93%
- Oval covers: 79%
- 5
- Finger width: 15.7 mm
- Round covers: 88%
- Oval covers: 75%
- 6
- Finger width: 16.5 mm
- Round covers: 84%
- Oval covers: 71%
- 7
- Finger width: 17.3 mm
- Round covers: 80%
- Oval covers: 68%
- 8
- Finger width: 18.1 mm
- Round covers: 76%
- Oval covers: 65%
- 9
- Finger width: 18.9 mm
- Round covers: 73%
- Oval covers: 62%
Spinel at nearby weights
- 5 carat spinel
- Round diameter: 10.9 mm
- 10 ct (this page)
- Round diameter: 13.8 mm
Questions
A round 10 carat spinel is about 13.8 mm across. Other shapes are longer than they are wide: an oval is 17.1 x 11.8 mm.
No. A round 10 carat spinel is 1% narrower than a 10 carat diamond (13.9 mm).
2.00 grams. A carat is 200 milligrams for every gem.
A round 10 carat spinel covers 84% of the width of a size 6 finger. Compare it with a ring you have tried on in the finger chart above.