How big is a 2 carat tanzanite?
By HeyGema™ · Updated
In short
A 2 carat round tanzanite measures about 8.3 mm across (0.33 inches), 2% wider than a 2 carat diamond (8.1 mm). An oval of the same weight is 10.2 x 7.0 mm and an emerald cut 9.0 x 6.4 mm.
- 8.3 mmround tanzanite, across
- 0.33 inthe same in inches
- 0.40 gweight
- 50%of a size 6 finger's width
Carat to mm calculator
About 8.3 x 8.3 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
Round
8.3 mm
Oval
10.2 x 7.0 mm
Cushion
7.2 x 7.2 mm
Princess
7.0 x 7.0 mm
Emerald cut
9.0 x 6.4 mm
Asscher
7.0 x 7.0 mm
Radiant
8.3 x 6.4 mm
Pear
10.9 x 7.0 mm
Marquise
13.3 x 6.7 mm
Heart
8.3 x 8.3 mm
Trillion
9.0 x 9.0 mm
Baguette
10.2 x 5.1 mm
= 5 mm in every picture above
2 carat tanzanite size by shape
Face-up measurements of a well-cut 2 carat tanzanite. Tanzanite is lighter than diamond (3.35 against 3.52), so the same weight gives a bigger stone, 2% wider across.
- Round
- Length x width: 8.3 mm
- In inches: 0.33 in
- Oval
- Length x width: 10.2 x 7.0 mm
- In inches: 0.40 x 0.28 in
- Cushion
- Length x width: 7.2 x 7.2 mm
- In inches: 0.28 x 0.28 in
- Princess
- Length x width: 7.0 x 7.0 mm
- In inches: 0.28 x 0.28 in
- Emerald cut
- Length x width: 9.0 x 6.4 mm
- In inches: 0.35 x 0.25 in
- Asscher
- Length x width: 7.0 x 7.0 mm
- In inches: 0.28 x 0.28 in
- Radiant
- Length x width: 8.3 x 6.4 mm
- In inches: 0.33 x 0.25 in
- Pear
- Length x width: 10.9 x 7.0 mm
- In inches: 0.43 x 0.28 in
- Marquise
- Length x width: 13.3 x 6.7 mm
- In inches: 0.52 x 0.26 in
- Heart
- Length x width: 8.3 x 8.3 mm
- In inches: 0.33 x 0.33 in
- Trillion
- Length x width: 9.0 x 9.0 mm
- In inches: 0.35 x 0.35 in
- Baguette
- Length x width: 10.2 x 5.1 mm
- In inches: 0.40 x 0.20 in
2 carat tanzanite 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
- Topaz
- Round, 2 carat: 8.1 mm
- Tanzanite (this page)
- Round, 2 carat: 8.3 mm
2 carat tanzanite on a finger
- 4
- Finger width: 14.9 mm
- Round covers: 56%
- Oval covers: 47%
- 5
- Finger width: 15.7 mm
- Round covers: 53%
- Oval covers: 45%
- 6
- Finger width: 16.5 mm
- Round covers: 50%
- Oval covers: 43%
- 7
- Finger width: 17.3 mm
- Round covers: 48%
- Oval covers: 41%
- 8
- Finger width: 18.1 mm
- Round covers: 46%
- Oval covers: 39%
- 9
- Finger width: 18.9 mm
- Round covers: 44%
- Oval covers: 37%
Tanzanite at nearby weights
- 1.5 carat tanzanite
- Round diameter: 7.5 mm
- 2 ct (this page)
- Round diameter: 8.3 mm
- 3 carat tanzanite
- Round diameter: 9.5 mm
Questions
A round 2 carat tanzanite is about 8.3 mm across. Other shapes are longer than they are wide: an oval is 10.2 x 7.0 mm.
Yes. A round 2 carat tanzanite is 2% wider than a 2 carat diamond (8.1 mm).
0.40 grams. A carat is 200 milligrams for every gem.
A round 2 carat tanzanite covers 50% of the width of a size 6 finger. Compare it with a ring you have tried on in the finger chart above.