2ct Spinel (Trillion, 9.17×9.17mm, Red) vs 2ct Sapphire (Trillion, 8.86×8.86mm, Blue)
Quick summary: When looked from above (face-up position), 2ct Spinel (9.17×9.17mm, trillion cut) appears 7% larger than 2ct Sapphire (8.86×8.86mm, trillion cut). See below how they compare side-by-side on a ring and finger.
| 2ct Spinel (trillion cut) |
vs
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2ct Sapphire (trillion cut) |
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red |
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| 9.17×9.17 mm | 8.86×8.86 mm | |
| actual size | ||
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Actual size is set for screen
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Ring:
Skin tone:
Ring width: 3.0 mm
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64 mm |
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Actual sizes of
2ct Spinel Trillion (9.17×9.17mm, Red)
and
2ct Sapphire Trillion (8.86×8.86mm, Blue)
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, Sapphire 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.
| 2 Ct Spinel (Trillion) | 2 Ct Sapphire (Trillion) | |
| 9.17×9.17 mm | vs | 8.86×8.86 mm |
| 52.14 mm² | 48.67 mm² |
| 2ct Spinel Trillion (9.17×9.17mm) | |
| 2ct Sapphire Trillion (8.86×8.86mm) | |
| Difference: 7% (3.47 mm²) |
2ct Spinel (Trillion, 9.17×9.17mm) has approx. 7% more face-up area than 2ct Sapphire (Trillion, 8.86×8.86mm).
Popular comparisons:
- 2ct Spinel (Trillion, Red, 9.17 x 9.17) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 2ct Spinel (Trillion, Red, 9.17 x 9.17) vs. 2ct Fluorite (Oval, Bluish Green, 10.29 x 6.86)
- 1ct Spinel (Trillion, Red, 7.28 x 7.28) vs. 1ct Sapphire (Trillion, Blue, 7.03 x 7.03)
- 2ct Spinel (Trillion, Violet, 9.17 x 9.17) vs. 0.5ct Diamond (Round, White, 5.16 x 5.16)
- 1.5ct Spinel (Trillion, Red, 8.33 x 8.33) vs. 1.2ct Emerald (Round, Green, 7.24 x 7.24)
- 6.7ct Spinel (Trillion, Red, 13.72 x 13.72) vs. 6.7ct Diamond (Cabochon, White, 13.47 x 8.98)
- 1.37ct Spinel (Trillion, Red, 8.09 x 8.09) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 5.64ct Spinel (Trillion, Red, 12.96 x 12.96) vs. 3.3ct Emerald (Emerald, Green, 10.84 x 8.03)