How big is a 10 carat alexandrite?
By HeyGema™ · Updated
In short
A 10 carat round alexandrite measures about 13.6 mm across (0.54 inches), 2% narrower than a 10 carat diamond (13.9 mm). An oval of the same weight is 16.9 x 11.6 mm and an emerald cut 14.8 x 10.6 mm.
- 13.6 mmround alexandrite, across
- 0.54 inthe same in inches
- 2.00 gweight
- 83%of a size 6 finger's width
Carat to mm calculator
About 13.6 x 13.6 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
Round
13.6 mm
Oval
16.9 x 11.6 mm
Cushion
11.8 x 11.8 mm
Princess
11.6 x 11.6 mm
Emerald cut
14.8 x 10.6 mm
Asscher
11.6 x 11.6 mm
Radiant
13.7 x 10.6 mm
Pear
18.0 x 11.6 mm
Marquise
22.0 x 11.0 mm
Heart
13.7 x 13.7 mm
Trillion
14.8 x 14.8 mm
Baguette
16.9 x 8.5 mm
= 5 mm in every picture above
10 carat alexandrite size by shape
Face-up measurements of a well-cut 10 carat alexandrite. Alexandrite is denser than diamond (3.73 against 3.52), so it packs more weight into less space and faces up 2% narrower for the same weight.
- Round
- Length x width: 13.6 mm
- In inches: 0.54 in
- Oval
- Length x width: 16.9 x 11.6 mm
- In inches: 0.67 x 0.46 in
- Cushion
- Length x width: 11.8 x 11.8 mm
- In inches: 0.47 x 0.47 in
- Princess
- Length x width: 11.6 x 11.6 mm
- In inches: 0.46 x 0.46 in
- Emerald cut
- Length x width: 14.8 x 10.6 mm
- In inches: 0.58 x 0.42 in
- Asscher
- Length x width: 11.6 x 11.6 mm
- In inches: 0.46 x 0.46 in
- Radiant
- Length x width: 13.7 x 10.6 mm
- In inches: 0.54 x 0.42 in
- Pear
- Length x width: 18.0 x 11.6 mm
- In inches: 0.71 x 0.46 in
- Marquise
- Length x width: 22.0 x 11.0 mm
- In inches: 0.87 x 0.43 in
- Heart
- Length x width: 13.7 x 13.7 mm
- In inches: 0.54 x 0.54 in
- Trillion
- Length x width: 14.8 x 14.8 mm
- In inches: 0.58 x 0.58 in
- Baguette
- Length x width: 16.9 x 8.5 mm
- In inches: 0.67 x 0.33 in
10 carat alexandrite 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
- Alexandrite (this page)
- Round, 10 carat: 13.6 mm
10 carat alexandrite on a finger
- 4
- Finger width: 14.9 mm
- Round covers: 92%
- Oval covers: 78%
- 5
- Finger width: 15.7 mm
- Round covers: 87%
- Oval covers: 74%
- 6
- Finger width: 16.5 mm
- Round covers: 83%
- Oval covers: 70%
- 7
- Finger width: 17.3 mm
- Round covers: 79%
- Oval covers: 67%
- 8
- Finger width: 18.1 mm
- Round covers: 75%
- Oval covers: 64%
- 9
- Finger width: 18.9 mm
- Round covers: 72%
- Oval covers: 61%
Alexandrite at nearby weights
- 5 carat alexandrite
- Round diameter: 10.8 mm
- 10 ct (this page)
- Round diameter: 13.6 mm
Questions
A round 10 carat alexandrite is about 13.6 mm across. Other shapes are longer than they are wide: an oval is 16.9 x 11.6 mm.
No. A round 10 carat alexandrite is 2% narrower than a 10 carat diamond (13.9 mm).
2.00 grams. A carat is 200 milligrams for every gem.
A round 10 carat alexandrite covers 83% of the width of a size 6 finger. Compare it with a ring you have tried on in the finger chart above.