How big is a 1.5 carat topaz?
By HeyGema™ · Updated
In short
A 1.5 carat round topaz measures about 7.4 mm across (0.29 inches), about the same width as a diamond of the same weight. An oval of the same weight is 9.1 x 6.3 mm and an emerald cut 8.0 x 5.7 mm.
- 7.4 mmround topaz, across
- 0.29 inthe same in inches
- 0.30 gweight
- 45%of a size 6 finger's width
Carat to mm calculator
About 7.4 x 7.4 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
Round
7.4 mm
Oval
9.1 x 6.3 mm
Cushion
6.4 x 6.4 mm
Princess
6.3 x 6.3 mm
Emerald cut
8.0 x 5.7 mm
Asscher
6.3 x 6.3 mm
Radiant
7.4 x 5.7 mm
Pear
9.7 x 6.3 mm
Marquise
11.9 x 5.9 mm
Heart
7.4 x 7.4 mm
Trillion
8.0 x 8.0 mm
Baguette
9.1 x 4.6 mm
= 2 mm in every picture above
1.5 carat topaz size by shape
Face-up measurements of a well-cut 1.5 carat topaz. Topaz has about the same density as diamond (3.53 against 3.52), so the same weight gives the same size.
- Round
- Length x width: 7.4 mm
- In inches: 0.29 in
- Oval
- Length x width: 9.1 x 6.3 mm
- In inches: 0.36 x 0.25 in
- Cushion
- Length x width: 6.4 x 6.4 mm
- In inches: 0.25 x 0.25 in
- Princess
- Length x width: 6.3 x 6.3 mm
- In inches: 0.25 x 0.25 in
- Emerald cut
- Length x width: 8.0 x 5.7 mm
- In inches: 0.32 x 0.23 in
- Asscher
- Length x width: 6.3 x 6.3 mm
- In inches: 0.25 x 0.25 in
- Radiant
- Length x width: 7.4 x 5.7 mm
- In inches: 0.29 x 0.23 in
- Pear
- Length x width: 9.7 x 6.3 mm
- In inches: 0.38 x 0.25 in
- Marquise
- Length x width: 11.9 x 5.9 mm
- In inches: 0.47 x 0.23 in
- Heart
- Length x width: 7.4 x 7.4 mm
- In inches: 0.29 x 0.29 in
- Trillion
- Length x width: 8.0 x 8.0 mm
- In inches: 0.32 x 0.32 in
- Baguette
- Length x width: 9.1 x 4.6 mm
- In inches: 0.36 x 0.18 in
1.5 carat topaz against other gems
- Diamond
- Round, 1.5 carat: 7.4 mm
- Moissanite
- Round, 1.5 carat: 7.6 mm
- Sapphire
- Round, 1.5 carat: 7.1 mm
- Ruby
- Round, 1.5 carat: 7.1 mm
- Emerald
- Round, 1.5 carat: 8.0 mm
- Aquamarine
- Round, 1.5 carat: 8.1 mm
- Morganite
- Round, 1.5 carat: 8.0 mm
- Tanzanite
- Round, 1.5 carat: 7.5 mm
- Topaz (this page)
- Round, 1.5 carat: 7.4 mm
1.5 carat topaz on a finger
- 4
- Finger width: 14.9 mm
- Round covers: 50%
- Oval covers: 42%
- 5
- Finger width: 15.7 mm
- Round covers: 47%
- Oval covers: 40%
- 6
- Finger width: 16.5 mm
- Round covers: 45%
- Oval covers: 38%
- 7
- Finger width: 17.3 mm
- Round covers: 43%
- Oval covers: 36%
- 8
- Finger width: 18.1 mm
- Round covers: 41%
- Oval covers: 35%
- 9
- Finger width: 18.9 mm
- Round covers: 39%
- Oval covers: 33%
Topaz at nearby weights
- 1 carat topaz
- Round diameter: 6.4 mm
- 1.5 ct (this page)
- Round diameter: 7.4 mm
- 2 carat topaz
- Round diameter: 8.1 mm
Questions
A round 1.5 carat topaz is about 7.4 mm across. Other shapes are longer than they are wide: an oval is 9.1 x 6.3 mm.
About the same. A round 1.5 carat topaz is about the same width as a diamond of the same weight.
0.30 grams. A carat is 200 milligrams for every gem.
A round 1.5 carat topaz covers 45% of the width of a size 6 finger. Compare it with a ring you have tried on in the finger chart above.