How big is a 0.5 carat amethyst?
By HeyGema™ · Updated
In short
A 0.5 carat round amethyst measures about 5.6 mm across (0.22 inches), 10% wider than a 0.5 carat diamond (5.1 mm). An oval of the same weight is 7.0 x 4.8 mm and an emerald cut 6.1 x 4.4 mm.
- 5.6 mmround amethyst, across
- 0.22 inthe same in inches
- 0.10 gweight
- 34%of a size 6 finger's width
Carat to mm calculator
About 5.6 x 5.6 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
Round
5.6 mm
Oval
7.0 x 4.8 mm
Cushion
4.9 x 4.9 mm
Princess
4.8 x 4.8 mm
Emerald cut
6.1 x 4.4 mm
Asscher
4.8 x 4.8 mm
Radiant
5.7 x 4.4 mm
Pear
7.4 x 4.8 mm
Marquise
9.1 x 4.5 mm
Heart
5.7 x 5.7 mm
Trillion
6.1 x 6.1 mm
Baguette
7.0 x 3.5 mm
= 2 mm in every picture above
0.5 carat amethyst size by shape
Face-up measurements of a well-cut 0.5 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: 5.6 mm
- In inches: 0.22 in
- Oval
- Length x width: 7.0 x 4.8 mm
- In inches: 0.27 x 0.19 in
- Cushion
- Length x width: 4.9 x 4.9 mm
- In inches: 0.19 x 0.19 in
- Princess
- Length x width: 4.8 x 4.8 mm
- In inches: 0.19 x 0.19 in
- Emerald cut
- Length x width: 6.1 x 4.4 mm
- In inches: 0.24 x 0.17 in
- Asscher
- Length x width: 4.8 x 4.8 mm
- In inches: 0.19 x 0.19 in
- Radiant
- Length x width: 5.7 x 4.4 mm
- In inches: 0.22 x 0.17 in
- Pear
- Length x width: 7.4 x 4.8 mm
- In inches: 0.29 x 0.19 in
- Marquise
- Length x width: 9.1 x 4.5 mm
- In inches: 0.36 x 0.18 in
- Heart
- Length x width: 5.7 x 5.7 mm
- In inches: 0.22 x 0.22 in
- Trillion
- Length x width: 6.1 x 6.1 mm
- In inches: 0.24 x 0.24 in
- Baguette
- Length x width: 7.0 x 3.5 mm
- In inches: 0.27 x 0.14 in
0.5 carat amethyst against other gems
- Diamond
- Round, 0.5 carat: 5.1 mm
- Moissanite
- Round, 0.5 carat: 5.3 mm
- Sapphire
- Round, 0.5 carat: 4.9 mm
- Ruby
- Round, 0.5 carat: 4.9 mm
- Emerald
- Round, 0.5 carat: 5.6 mm
- Aquamarine
- Round, 0.5 carat: 5.6 mm
- Morganite
- Round, 0.5 carat: 5.5 mm
- Tanzanite
- Round, 0.5 carat: 5.2 mm
- Amethyst (this page)
- Round, 0.5 carat: 5.6 mm
0.5 carat amethyst on a finger
- 4
- Finger width: 14.9 mm
- Round covers: 38%
- Oval covers: 32%
- 5
- Finger width: 15.7 mm
- Round covers: 36%
- Oval covers: 31%
- 6
- Finger width: 16.5 mm
- Round covers: 34%
- Oval covers: 29%
- 7
- Finger width: 17.3 mm
- Round covers: 32%
- Oval covers: 28%
- 8
- Finger width: 18.1 mm
- Round covers: 31%
- Oval covers: 26%
- 9
- Finger width: 18.9 mm
- Round covers: 30%
- Oval covers: 25%
Amethyst at nearby weights
- 0.5 ct (this page)
- Round diameter: 5.6 mm
- 1 carat amethyst
- Round diameter: 7.1 mm
Questions
A round 0.5 carat amethyst is about 5.6 mm across. Other shapes are longer than they are wide: an oval is 7.0 x 4.8 mm.
Yes. A round 0.5 carat amethyst is 10% wider than a 0.5 carat diamond (5.1 mm).
0.10 grams. A carat is 200 milligrams for every gem.
A round 0.5 carat amethyst covers 34% of the width of a size 6 finger. Compare it with a ring you have tried on in the finger chart above.