How big is a 10 carat tourmaline?
By HeyGema™ · Updated
In short
A 10 carat round tourmaline measures about 14.6 mm across (0.57 inches), 5% wider than a 10 carat diamond (13.9 mm). An oval of the same weight is 18.1 x 12.4 mm and an emerald cut 15.8 x 11.3 mm.
- 14.6 mmround tourmaline, across
- 0.57 inthe same in inches
- 2.00 gweight
- 88%of a size 6 finger's width
Carat to mm calculator
About 14.6 x 14.6 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
Round
14.6 mm
Oval
18.1 x 12.4 mm
Cushion
12.6 x 12.6 mm
Princess
12.4 x 12.4 mm
Emerald cut
15.8 x 11.3 mm
Asscher
12.4 x 12.4 mm
Radiant
14.7 x 11.3 mm
Pear
19.2 x 12.4 mm
Marquise
23.5 x 11.7 mm
Heart
14.7 x 14.7 mm
Trillion
15.8 x 15.8 mm
Baguette
18.1 x 9.0 mm
= 5 mm in every picture above
10 carat tourmaline size by shape
Face-up measurements of a well-cut 10 carat tourmaline. Tourmaline is lighter than diamond (3.06 against 3.52), so the same weight gives a bigger stone, 5% wider across.
- Round
- Length x width: 14.6 mm
- In inches: 0.57 in
- Oval
- Length x width: 18.1 x 12.4 mm
- In inches: 0.71 x 0.49 in
- Cushion
- Length x width: 12.6 x 12.6 mm
- In inches: 0.50 x 0.50 in
- Princess
- Length x width: 12.4 x 12.4 mm
- In inches: 0.49 x 0.49 in
- Emerald cut
- Length x width: 15.8 x 11.3 mm
- In inches: 0.62 x 0.44 in
- Asscher
- Length x width: 12.4 x 12.4 mm
- In inches: 0.49 x 0.49 in
- Radiant
- Length x width: 14.7 x 11.3 mm
- In inches: 0.58 x 0.44 in
- Pear
- Length x width: 19.2 x 12.4 mm
- In inches: 0.76 x 0.49 in
- Marquise
- Length x width: 23.5 x 11.7 mm
- In inches: 0.92 x 0.46 in
- Heart
- Length x width: 14.7 x 14.7 mm
- In inches: 0.58 x 0.58 in
- Trillion
- Length x width: 15.8 x 15.8 mm
- In inches: 0.62 x 0.62 in
- Baguette
- Length x width: 18.1 x 9.0 mm
- In inches: 0.71 x 0.36 in
10 carat tourmaline 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
- Tourmaline (this page)
- Round, 10 carat: 14.6 mm
10 carat tourmaline on a finger
- 4
- Finger width: 14.9 mm
- Round covers: 98%
- Oval covers: 83%
- 5
- Finger width: 15.7 mm
- Round covers: 93%
- Oval covers: 79%
- 6
- Finger width: 16.5 mm
- Round covers: 88%
- Oval covers: 75%
- 7
- Finger width: 17.3 mm
- Round covers: 84%
- Oval covers: 72%
- 8
- Finger width: 18.1 mm
- Round covers: 80%
- Oval covers: 68%
- 9
- Finger width: 18.9 mm
- Round covers: 77%
- Oval covers: 66%
Tourmaline at nearby weights
- 5 carat tourmaline
- Round diameter: 11.6 mm
- 10 ct (this page)
- Round diameter: 14.6 mm
Questions
A round 10 carat tourmaline is about 14.6 mm across. Other shapes are longer than they are wide: an oval is 18.1 x 12.4 mm.
Yes. A round 10 carat tourmaline is 5% wider than a 10 carat diamond (13.9 mm).
2.00 grams. A carat is 200 milligrams for every gem.
A round 10 carat tourmaline covers 88% of the width of a size 6 finger. Compare it with a ring you have tried on in the finger chart above.