How big is a 1.5 carat alexandrite?
By HeyGema™ · Updated
In short
A 1.5 carat round alexandrite measures about 7.2 mm across (0.29 inches), 2% narrower than a 1.5 carat diamond (7.4 mm). An oval of the same weight is 9.0 x 6.2 mm and an emerald cut 7.9 x 5.6 mm.
- 7.2 mmround alexandrite, across
- 0.29 inthe same in inches
- 0.30 gweight
- 44%of a size 6 finger's width
Carat to mm calculator
About 7.2 x 7.2 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
Round
7.2 mm
Oval
9.0 x 6.2 mm
Cushion
6.3 x 6.3 mm
Princess
6.2 x 6.2 mm
Emerald cut
7.9 x 5.6 mm
Asscher
6.2 x 6.2 mm
Radiant
7.3 x 5.6 mm
Pear
9.5 x 6.2 mm
Marquise
11.7 x 5.8 mm
Heart
7.3 x 7.3 mm
Trillion
7.9 x 7.9 mm
Baguette
9.0 x 4.5 mm
= 2 mm in every picture above
1.5 carat alexandrite size by shape
Face-up measurements of a well-cut 1.5 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: 7.2 mm
- In inches: 0.29 in
- Oval
- Length x width: 9.0 x 6.2 mm
- In inches: 0.35 x 0.24 in
- Cushion
- Length x width: 6.3 x 6.3 mm
- In inches: 0.25 x 0.25 in
- Princess
- Length x width: 6.2 x 6.2 mm
- In inches: 0.24 x 0.24 in
- Emerald cut
- Length x width: 7.9 x 5.6 mm
- In inches: 0.31 x 0.22 in
- Asscher
- Length x width: 6.2 x 6.2 mm
- In inches: 0.24 x 0.24 in
- Radiant
- Length x width: 7.3 x 5.6 mm
- In inches: 0.29 x 0.22 in
- Pear
- Length x width: 9.5 x 6.2 mm
- In inches: 0.38 x 0.24 in
- Marquise
- Length x width: 11.7 x 5.8 mm
- In inches: 0.46 x 0.23 in
- Heart
- Length x width: 7.3 x 7.3 mm
- In inches: 0.29 x 0.29 in
- Trillion
- Length x width: 7.9 x 7.9 mm
- In inches: 0.31 x 0.31 in
- Baguette
- Length x width: 9.0 x 4.5 mm
- In inches: 0.35 x 0.18 in
1.5 carat alexandrite 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
- Alexandrite (this page)
- Round, 1.5 carat: 7.2 mm
1.5 carat alexandrite on a finger
- 4
- Finger width: 14.9 mm
- Round covers: 49%
- Oval covers: 41%
- 5
- Finger width: 15.7 mm
- Round covers: 46%
- Oval covers: 39%
- 6
- Finger width: 16.5 mm
- Round covers: 44%
- Oval covers: 37%
- 7
- Finger width: 17.3 mm
- Round covers: 42%
- Oval covers: 36%
- 8
- Finger width: 18.1 mm
- Round covers: 40%
- Oval covers: 34%
- 9
- Finger width: 18.9 mm
- Round covers: 38%
- Oval covers: 33%
Alexandrite at nearby weights
- 1 carat alexandrite
- Round diameter: 6.3 mm
- 1.5 ct (this page)
- Round diameter: 7.2 mm
- 2 carat alexandrite
- Round diameter: 8.0 mm
Questions
A round 1.5 carat alexandrite is about 7.2 mm across. Other shapes are longer than they are wide: an oval is 9.0 x 6.2 mm.
No. A round 1.5 carat alexandrite is 2% narrower than a 1.5 carat diamond (7.4 mm).
0.30 grams. A carat is 200 milligrams for every gem.
A round 1.5 carat alexandrite covers 44% of the width of a size 6 finger. Compare it with a ring you have tried on in the finger chart above.