18ct Spinel (Trillion, 19.84×19.84mm, Red) vs 18ct Andesine (Trillion, 21.92×21.92mm, Orange)
Quick summary: When looked from above (face-up position), 18ct Andesine (21.92×21.92mm, trillion cut) appears 22% larger than 18ct Spinel (19.84×19.84mm, trillion cut). See below how they compare side-by-side on a ring and finger.
| 18ct Spinel (trillion cut) |
vs
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18ct Andesine (trillion cut) |
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red |
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| 19.84×19.84 mm | 21.92×21.92 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
18ct Spinel Trillion (19.84×19.84mm, Red)
and
18ct Andesine Trillion (21.92×21.92mm, Orange)
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, Spinel will face-up smaller than Andesine for a given
carat weight, because it has higher specific gravity
(3.6 vs. 2.67 - this means it's "heavier" compared to Andesine 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.
| 18 Ct Spinel (Trillion) | 18 Ct Andesine (Trillion) | |
| 19.84×19.84 mm | vs | 21.92×21.92 mm |
| 244.05 mm² | 297.9 mm² |
| 18ct Spinel Trillion (19.84×19.84mm) | |
| 18ct Andesine Trillion (21.92×21.92mm) | |
| Difference: 22% (53.85 mm²) |
18ct Andesine (Trillion, 21.92×21.92mm) has approx. 22% more face-up area than 18ct Spinel (Trillion, 19.84×19.84mm).
Popular comparisons:
- 2ct Spinel (Trillion, Red, 9.17 x 9.17) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 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)
- 5ct Spinel (Trillion, Red, 12.45 x 12.45) vs. 5ct Sapphire (Trillion, Blue, 12.02 x 12.02)
- 2ct Spinel (Trillion, Red, 9.17 x 9.17) vs. 2ct Sapphire (Trillion, Blue, 8.86 x 8.86)
- 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)