How big is a 10 carat turquoise?

By HeyGema™ · Updated

In short

A 10 carat round turquoise measures about 15.1 mm across (0.59 inches), 8% wider than a 10 carat diamond (13.9 mm). An oval of the same weight is 18.7 x 12.9 mm and an emerald cut 16.4 x 11.7 mm.

Carat to mm calculator

About 15.1 x 15.1 mm

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

Round
15.1 mm
Oval
18.7 x 12.9 mm
Cushion
13.1 x 13.1 mm
Princess
12.9 x 12.9 mm
Emerald cut
16.4 x 11.7 mm
Asscher
12.9 x 12.9 mm
Radiant
15.2 x 11.7 mm
Pear
19.9 x 12.9 mm
Marquise
24.3 x 12.1 mm
Heart
15.2 x 15.2 mm
Trillion
16.4 x 16.4 mm
Baguette
18.7 x 9.3 mm
= 5 mm in every picture above
A 10 carat turquoise in 12 shapes, drawn to one scale.

10 carat turquoise size by shape

Face-up measurements of a well-cut 10 carat turquoise. Turquoise is lighter than diamond (2.76 against 3.52), so the same weight gives a bigger stone, 8% wider across.

Round
Length x width: 15.1 mm
In inches: 0.59 in
Oval
Length x width: 18.7 x 12.9 mm
In inches: 0.74 x 0.51 in
Cushion
Length x width: 13.1 x 13.1 mm
In inches: 0.52 x 0.52 in
Princess
Length x width: 12.9 x 12.9 mm
In inches: 0.51 x 0.51 in
Emerald cut
Length x width: 16.4 x 11.7 mm
In inches: 0.64 x 0.46 in
Asscher
Length x width: 12.9 x 12.9 mm
In inches: 0.51 x 0.51 in
Radiant
Length x width: 15.2 x 11.7 mm
In inches: 0.60 x 0.46 in
Pear
Length x width: 19.9 x 12.9 mm
In inches: 0.78 x 0.51 in
Marquise
Length x width: 24.3 x 12.1 mm
In inches: 0.96 x 0.48 in
Heart
Length x width: 15.2 x 15.2 mm
In inches: 0.60 x 0.60 in
Trillion
Length x width: 16.4 x 16.4 mm
In inches: 0.64 x 0.64 in
Baguette
Length x width: 18.7 x 9.3 mm
In inches: 0.74 x 0.37 in

10 carat turquoise 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
Turquoise (this page)
Round, 10 carat: 15.1 mm

10 carat turquoise on a finger

15.1 mm
15.1 mm stone on a 16.5 mm finger: it covers 91% of the widthA round 10 carat turquoise on a size 6 finger.
4
Finger width: 14.9 mm
Round covers: 101%
Oval covers: 86%
5
Finger width: 15.7 mm
Round covers: 96%
Oval covers: 82%
6
Finger width: 16.5 mm
Round covers: 91%
Oval covers: 78%
7
Finger width: 17.3 mm
Round covers: 87%
Oval covers: 74%
8
Finger width: 18.1 mm
Round covers: 83%
Oval covers: 71%
9
Finger width: 18.9 mm
Round covers: 80%
Oval covers: 68%

Turquoise at nearby weights

5 carat turquoise
Round diameter: 12.0 mm
10 ct (this page)
Round diameter: 15.1 mm

Questions

A round 10 carat turquoise is about 15.1 mm across. Other shapes are longer than they are wide: an oval is 18.7 x 12.9 mm.
Yes. A round 10 carat turquoise is 8% wider than a 10 carat diamond (13.9 mm).
2.00 grams. A carat is 200 milligrams for every gem.
A round 10 carat turquoise covers 91% 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