How big is a 1.5 carat amethyst?
By HeyGema™ · Updated
In short
A 1.5 carat round amethyst measures about 8.1 mm across (0.32 inches), 10% wider than a 1.5 carat diamond (7.4 mm). An oval of the same weight is 10.1 x 6.9 mm and an emerald cut 8.8 x 6.3 mm.
- 8.1 mmround amethyst, across
- 0.32 inthe same in inches
- 0.30 gweight
- 49%of a size 6 finger's width
Carat to mm calculator
About 8.1 x 8.1 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
Round
8.1 mm
Oval
10.1 x 6.9 mm
Cushion
7.0 x 7.0 mm
Princess
6.9 x 6.9 mm
Emerald cut
8.8 x 6.3 mm
Asscher
6.9 x 6.9 mm
Radiant
8.2 x 6.3 mm
Pear
10.7 x 6.9 mm
Marquise
13.1 x 6.5 mm
Heart
8.2 x 8.2 mm
Trillion
8.8 x 8.8 mm
Baguette
10.1 x 5.0 mm
= 5 mm in every picture above
1.5 carat amethyst size by shape
Face-up measurements of a well-cut 1.5 carat amethyst. Amethyst is lighter than diamond (2.65 against 3.52), so the same weight gives a bigger stone, 10% wider across.
- Round
- Length x width: 8.1 mm
- In inches: 0.32 in
- Oval
- Length x width: 10.1 x 6.9 mm
- In inches: 0.40 x 0.27 in
- Cushion
- Length x width: 7.0 x 7.0 mm
- In inches: 0.28 x 0.28 in
- Princess
- Length x width: 6.9 x 6.9 mm
- In inches: 0.27 x 0.27 in
- Emerald cut
- Length x width: 8.8 x 6.3 mm
- In inches: 0.35 x 0.25 in
- Asscher
- Length x width: 6.9 x 6.9 mm
- In inches: 0.27 x 0.27 in
- Radiant
- Length x width: 8.2 x 6.3 mm
- In inches: 0.32 x 0.25 in
- Pear
- Length x width: 10.7 x 6.9 mm
- In inches: 0.42 x 0.27 in
- Marquise
- Length x width: 13.1 x 6.5 mm
- In inches: 0.52 x 0.26 in
- Heart
- Length x width: 8.2 x 8.2 mm
- In inches: 0.32 x 0.32 in
- Trillion
- Length x width: 8.8 x 8.8 mm
- In inches: 0.35 x 0.35 in
- Baguette
- Length x width: 10.1 x 5.0 mm
- In inches: 0.40 x 0.20 in
1.5 carat amethyst 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
- Amethyst (this page)
- Round, 1.5 carat: 8.1 mm
1.5 carat amethyst on a finger
- 4
- Finger width: 14.9 mm
- Round covers: 55%
- Oval covers: 47%
- 5
- Finger width: 15.7 mm
- Round covers: 52%
- Oval covers: 44%
- 6
- Finger width: 16.5 mm
- Round covers: 49%
- Oval covers: 42%
- 7
- Finger width: 17.3 mm
- Round covers: 47%
- Oval covers: 40%
- 8
- Finger width: 18.1 mm
- Round covers: 45%
- Oval covers: 38%
- 9
- Finger width: 18.9 mm
- Round covers: 43%
- Oval covers: 37%
Amethyst at nearby weights
- 1 carat amethyst
- Round diameter: 7.1 mm
- 1.5 ct (this page)
- Round diameter: 8.1 mm
- 2 carat amethyst
- Round diameter: 8.9 mm
Questions
A round 1.5 carat amethyst is about 8.1 mm across. Other shapes are longer than they are wide: an oval is 10.1 x 6.9 mm.
Yes. A round 1.5 carat amethyst is 10% wider 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 amethyst covers 49% of the width of a size 6 finger. Compare it with a ring you have tried on in the finger chart above.