How big is a 5 carat topaz?

By HeyGema™ · Updated

In short

A 5 carat round topaz measures about 11.0 mm across (0.43 inches), about the same width as a diamond of the same weight. An oval of the same weight is 13.7 x 9.4 mm and an emerald cut 12.0 x 8.5 mm.

Carat to mm calculator

About 11.0 x 11.0 mm

An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.

Round
11.0 mm
Oval
13.7 x 9.4 mm
Cushion
9.6 x 9.6 mm
Princess
9.4 x 9.4 mm
Emerald cut
12.0 x 8.5 mm
Asscher
9.4 x 9.4 mm
Radiant
11.1 x 8.5 mm
Pear
14.5 x 9.4 mm
Marquise
17.8 x 8.9 mm
Heart
11.1 x 11.1 mm
Trillion
12.0 x 12.0 mm
Baguette
13.7 x 6.8 mm
= 5 mm in every picture above
A 5 carat topaz in 12 shapes, drawn to one scale.

5 carat topaz size by shape

Face-up measurements of a well-cut 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: 11.0 mm
In inches: 0.43 in
Oval
Length x width: 13.7 x 9.4 mm
In inches: 0.54 x 0.37 in
Cushion
Length x width: 9.6 x 9.6 mm
In inches: 0.38 x 0.38 in
Princess
Length x width: 9.4 x 9.4 mm
In inches: 0.37 x 0.37 in
Emerald cut
Length x width: 12.0 x 8.5 mm
In inches: 0.47 x 0.34 in
Asscher
Length x width: 9.4 x 9.4 mm
In inches: 0.37 x 0.37 in
Radiant
Length x width: 11.1 x 8.5 mm
In inches: 0.44 x 0.34 in
Pear
Length x width: 14.5 x 9.4 mm
In inches: 0.57 x 0.37 in
Marquise
Length x width: 17.8 x 8.9 mm
In inches: 0.70 x 0.35 in
Heart
Length x width: 11.1 x 11.1 mm
In inches: 0.44 x 0.44 in
Trillion
Length x width: 12.0 x 12.0 mm
In inches: 0.47 x 0.47 in
Baguette
Length x width: 13.7 x 6.8 mm
In inches: 0.54 x 0.27 in

5 carat topaz against other gems

Diamond
Round, 5 carat: 11.0 mm
Moissanite
Round, 5 carat: 11.4 mm
Sapphire
Round, 5 carat: 10.6 mm
Ruby
Round, 5 carat: 10.6 mm
Emerald
Round, 5 carat: 12.0 mm
Aquamarine
Round, 5 carat: 12.0 mm
Morganite
Round, 5 carat: 11.9 mm
Tanzanite
Round, 5 carat: 11.2 mm
Topaz (this page)
Round, 5 carat: 11.0 mm

5 carat topaz on a finger

11.0 mm
11.0 mm stone on a 16.5 mm finger: it covers 67% of the widthA round 5 carat topaz on a size 6 finger.
4
Finger width: 14.9 mm
Round covers: 74%
Oval covers: 63%
5
Finger width: 15.7 mm
Round covers: 70%
Oval covers: 60%
6
Finger width: 16.5 mm
Round covers: 67%
Oval covers: 57%
7
Finger width: 17.3 mm
Round covers: 64%
Oval covers: 54%
8
Finger width: 18.1 mm
Round covers: 61%
Oval covers: 52%
9
Finger width: 18.9 mm
Round covers: 58%
Oval covers: 50%

Topaz at nearby weights

4 carat topaz
Round diameter: 10.2 mm
5 ct (this page)
Round diameter: 11.0 mm
10 carat topaz
Round diameter: 13.9 mm

Questions

A round 5 carat topaz is about 11.0 mm across. Other shapes are longer than they are wide: an oval is 13.7 x 9.4 mm.
About the same. A round 5 carat topaz is about the same width as a diamond of the same weight.
1.00 grams. A carat is 200 milligrams for every gem.
A round 5 carat topaz covers 67% of the width of a size 6 finger. Compare it with a ring you have tried on in the finger chart above.

More size charts