How big is a 2 carat tourmaline?
By HeyGema™ · Updated
In short
A 2 carat round tourmaline measures about 8.5 mm across (0.34 inches), 5% wider than a 2 carat diamond (8.1 mm). An oval of the same weight is 10.6 x 7.3 mm and an emerald cut 9.2 x 6.6 mm.
- 8.5 mmround tourmaline, across
- 0.34 inthe same in inches
- 0.40 gweight
- 52%of a size 6 finger's width
Carat to mm calculator
About 8.5 x 8.5 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
Round
8.5 mm
Oval
10.6 x 7.3 mm
Cushion
7.4 x 7.4 mm
Princess
7.3 x 7.3 mm
Emerald cut
9.2 x 6.6 mm
Asscher
7.3 x 7.3 mm
Radiant
8.6 x 6.6 mm
Pear
11.2 x 7.3 mm
Marquise
13.7 x 6.9 mm
Heart
8.6 x 8.6 mm
Trillion
9.2 x 9.2 mm
Baguette
10.6 x 5.3 mm
= 5 mm in every picture above
2 carat tourmaline size by shape
Face-up measurements of a well-cut 2 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: 8.5 mm
- In inches: 0.34 in
- Oval
- Length x width: 10.6 x 7.3 mm
- In inches: 0.42 x 0.29 in
- Cushion
- Length x width: 7.4 x 7.4 mm
- In inches: 0.29 x 0.29 in
- Princess
- Length x width: 7.3 x 7.3 mm
- In inches: 0.29 x 0.29 in
- Emerald cut
- Length x width: 9.2 x 6.6 mm
- In inches: 0.36 x 0.26 in
- Asscher
- Length x width: 7.3 x 7.3 mm
- In inches: 0.29 x 0.29 in
- Radiant
- Length x width: 8.6 x 6.6 mm
- In inches: 0.34 x 0.26 in
- Pear
- Length x width: 11.2 x 7.3 mm
- In inches: 0.44 x 0.29 in
- Marquise
- Length x width: 13.7 x 6.9 mm
- In inches: 0.54 x 0.27 in
- Heart
- Length x width: 8.6 x 8.6 mm
- In inches: 0.34 x 0.34 in
- Trillion
- Length x width: 9.2 x 9.2 mm
- In inches: 0.36 x 0.36 in
- Baguette
- Length x width: 10.6 x 5.3 mm
- In inches: 0.42 x 0.21 in
2 carat tourmaline against other gems
- Diamond
- Round, 2 carat: 8.1 mm
- Moissanite
- Round, 2 carat: 8.4 mm
- Sapphire
- Round, 2 carat: 7.8 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
- Tourmaline (this page)
- Round, 2 carat: 8.5 mm
2 carat tourmaline on a finger
- 4
- Finger width: 14.9 mm
- Round covers: 57%
- Oval covers: 49%
- 5
- Finger width: 15.7 mm
- Round covers: 54%
- Oval covers: 46%
- 6
- Finger width: 16.5 mm
- Round covers: 52%
- Oval covers: 44%
- 7
- Finger width: 17.3 mm
- Round covers: 49%
- Oval covers: 42%
- 8
- Finger width: 18.1 mm
- Round covers: 47%
- Oval covers: 40%
- 9
- Finger width: 18.9 mm
- Round covers: 45%
- Oval covers: 38%
Tourmaline at nearby weights
- 1.5 carat tourmaline
- Round diameter: 7.7 mm
- 2 ct (this page)
- Round diameter: 8.5 mm
- 3 carat tourmaline
- Round diameter: 9.7 mm
Questions
A round 2 carat tourmaline is about 8.5 mm across. Other shapes are longer than they are wide: an oval is 10.6 x 7.3 mm.
Yes. A round 2 carat tourmaline is 5% wider than a 2 carat diamond (8.1 mm).
0.40 grams. A carat is 200 milligrams for every gem.
A round 2 carat tourmaline covers 52% of the width of a size 6 finger. Compare it with a ring you have tried on in the finger chart above.