How big is a 8 carat trillion cut diamond?
By HeyGema™ · Updated
In short
A 8 carat trillion cut diamond measures about 14.0 x 14.0 mm. It faces up 14% smaller than a round diamond of the same weight. On a size 6 finger it covers 85% of the width. For the same weight, a round diamond is 12.9 mm.
- 14.0 x 14.0 mm8 carat trillion
- 0.55 x 0.55 inthe same in inches
- -14%face-up size vs a round
- 85%of a size 6 finger's width
Carat to mm calculator
About 14.0 x 14.0 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
8 ct trillion
14.0 x 14.0 mm
8 ct round
12.9 mm
Side by side
8 ct round inside 8 ct trillion
8 carat trillion diamond size
A well-cut 8 carat trillion cut diamond measures about 14.0 x 14.0 mm (0.55 x 0.55 inches) at a length-to-width ratio of 1.00:1. It faces up 14% smaller than a round diamond of the same weight. It weighs 1.60 grams.
8 carat trillion on a finger
- 4
- Finger width: 14.9 mm
- Trillion covers: 94%
- 5
- Finger width: 15.7 mm
- Trillion covers: 89%
- 6
- Finger width: 16.5 mm
- Trillion covers: 85%
- 7
- Finger width: 17.3 mm
- Trillion covers: 81%
- 8
- Finger width: 18.1 mm
- Trillion covers: 77%
- 9
- Finger width: 18.9 mm
- Trillion covers: 74%
Trillion sizes near 8 carat
- 5 carat
- Length x width: 12.0 x 12.0 mm
- Round of the same weight: 11.0 mm
- 6 carat
- Length x width: 12.7 x 12.7 mm
- Round of the same weight: 11.7 mm
- 8 (this page)
- Length x width: 14.0 x 14.0 mm
- Round of the same weight: 12.9 mm
- 10 carat
- Length x width: 15.1 x 15.1 mm
- Round of the same weight: 13.9 mm
8 carat in other shapes
Every row is a well-cut diamond of 8 carat. The last column is the face-up size against the trillion.
- Round
- Length x width: 12.9 mm
- Against trillion: +16%
- Oval
- Length x width: 16.0 x 11.0 mm
- Against trillion: +22%
- Cushion
- Length x width: 11.2 x 11.2 mm
- Against trillion: -1%
- Princess
- Length x width: 11.0 x 11.0 mm
- Against trillion: +6%
- Emerald cut
- Length x width: 14.0 x 10.0 mm
- Against trillion: +20%
- Asscher
- Length x width: 11.0 x 11.0 mm
- Against trillion: -2%
- Radiant
- Length x width: 13.0 x 10.0 mm
- Against trillion: +13%
- Pear
- Length x width: 17.0 x 11.0 mm
- Against trillion: +12%
- Marquise
- Length x width: 20.8 x 10.4 mm
- Against trillion: +34%
- Heart
- Length x width: 13.0 x 13.0 mm
- Against trillion: -4%
- Baguette
- Length x width: 16.0 x 8.0 mm
- Against trillion: +13%
Questions
A 8 carat trillion cut diamond is about 14.0 x 14.0 mm at the usual 1.00:1 ratio.
No. Face-up, a 8 carat trillion is 14% smaller than a 8 carat round (12.9 mm).
There is no rule. The stone is wider than most fingers. Compare it with a ring you have tried on in the finger chart above.
Yes. A lab grown diamond has the same density as a mined one, so it measures the same for the same weight.