1.25ct Ruby (Trillion, 7.87×7.87mm, Red) vs 1.25ct Spinel (Trillion, 8.16×8.16mm, Red)
Quick summary: When looked from above (face-up position), 1.25ct Spinel (8.16×8.16mm, trillion cut) appears 8% larger than 1.25ct Ruby (7.87×7.87mm, trillion cut). See below how they compare side-by-side on a ring and finger.
| 1.25ct Ruby (trillion cut) |
vs
|
1.25ct Spinel (trillion cut) |
|
red |
|
|
| 7.87×7.87 mm | 8.16×8.16 mm | |
| actual size | ||
|
|
|
|
|
||
Actual size is set for screen
|
Ring:
Skin tone:
Ring width: 3.0 mm
|
|
64 mm |
|
|
|||||||||||||||||
|
|||||||||||||||||||||
Actual sizes of
1.25ct Ruby Trillion (7.87×7.87mm, Red)
and
1.25ct Spinel Trillion (8.16×8.16mm, Red)
as they would appear on a ring and finger.
Adjust the ring and finger size to get an idea of how these gemstones would look on your finger.
Where to buy?
For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile
Face-up Size
All things being equal, Ruby will face-up smaller than Spinel for a given
carat weight, because it has higher specific gravity
(4 vs. 3.6 - this means it's "heavier" compared to Spinel of the same size). Face-up size also depends heavily on the proportions of the cut.
Face-up area is a measure of the size of the gem when viewed from above (as set in a ring). It tells you how big the gem is at the girdle plane.
Face-up area is a measure of the size of the gem when viewed from above (as set in a ring). It tells you how big the gem is at the girdle plane.
| 1.25 Ct Ruby (Trillion) | 1.25 Ct Spinel (Trillion) | |
| 7.87×7.87 mm | vs | 8.16×8.16 mm |
| 38.4 mm² | 41.28 mm² |
| 1.25ct Ruby Trillion (7.87×7.87mm) | |
| 1.25ct Spinel Trillion (8.16×8.16mm) | |
| Difference: 8% (2.88 mm²) |
1.25ct Spinel (Trillion, 8.16×8.16mm) has approx. 8% more face-up area than 1.25ct Ruby (Trillion, 7.87×7.87mm).
Popular comparisons:
- 5ct Ruby (Trillion, Red, 12.02 x 12.02) vs. 5ct Diamond (Cabochon, White, 12.21 x 8.14)
- 14ct Ruby (Trillion, Red, 16.94 x 16.94) vs. 5ct Ruby (Marquise, Red, 16.88 x 8.44)
- 1ct Ruby (Trillion, Red, 7.03 x 7.03) vs. 0.44ct Ruby (Trillion, Red, 5.35 x 5.35)
- 1.15ct Ruby (Trillion, Red, 7.36 x 7.36) vs. 1.56ct Ruby (Trillion, Red, 8.15 x 8.15)
- 2.5ct Ruby (Trillion, Red, 9.54 x 9.54) vs. 4.3ct Ruby (Round, Red, 9.72 x 9.72)
- 0.5ct Ruby (Trillion, Red, 5.58 x 5.58) vs. 3ct Topaz (Emerald, Light Violet, 9.6 x 7.11)
- 1ct Ruby (Trillion, Red, 7.03 x 7.03) vs. 0.85ct Ruby (Oval, Red, 7.17 x 4.78)
- 1ct Ruby (Trillion, Red, 7.03 x 7.03) vs. 0.65ct Emerald (Trillion, Green, 6.94 x 6.94)
- 1ct Ruby (Trillion, Red, 7.03 x 7.03) vs. 0.56ct Ruby (Trillion, Red, 5.79 x 5.79)