8.5ct Sapphire (Trillion, 14.92×14.92mm, Blue) vs 8.5ct Topaz (Trillion, 15.55×15.55mm, Blue)
Quick summary: When looked from above (face-up position), 8.5ct Topaz (15.55×15.55mm, trillion cut) appears 9% larger than 8.5ct Sapphire (14.92×14.92mm, trillion cut). See below how they compare side-by-side on a ring and finger.
| 8.5ct Sapphire (trillion cut) |
vs
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8.5ct Topaz (trillion cut) |
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blue |
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| 14.92×14.92 mm | 15.55×15.55 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
8.5ct Sapphire Trillion (14.92×14.92mm, Blue)
and
8.5ct Topaz Trillion (15.55×15.55mm, 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 Topaz for a given
carat weight, because it has higher specific gravity
(4 vs. 3.53 - this means it's "heavier" compared to Topaz 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.
| 8.5 Ct Sapphire (Trillion) | 8.5 Ct Topaz (Trillion) | |
| 14.92×14.92 mm | vs | 15.55×15.55 mm |
| 138.02 mm² | 149.92 mm² |
| 8.5ct Sapphire Trillion (14.92×14.92mm) | |
| 8.5ct Topaz Trillion (15.55×15.55mm) | |
| Difference: 9% (11.9 mm²) |
8.5ct Topaz (Trillion, 15.55×15.55mm) has approx. 9% more face-up area than 8.5ct Sapphire (Trillion, 14.92×14.92mm).
Popular comparisons:
- 1.5ct Sapphire (Trillion, Violet, 8.05 x 8.05) vs. 1.52ct Diamond (Oval, White, 9.33 x 6.22)
- 2ct Sapphire (Trillion, Blue, 8.86 x 8.86) vs. 19ct Diamond (Princess, White, 14.7 x 14.7)
- 0.7ct Sapphire (Trillion, Blue, 6.24 x 6.24) vs. 0.7ct Diamond (Trillion, White, 6.87 x 6.87)
- 0.7ct Sapphire (Trillion, Blue, 7 x 5) vs. 0.7ct Diamond (Trillion, White, 6.87 x 6.87)
- 2ct Sapphire (Trillion, Blue, 8.86 x 8.86) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
- 0.4ct Sapphire (Trillion, Blue, 5.18 x 5.18) vs. 0.6ct Ruby (Cushion, Red, 4.72 x 4.72)
- 0.8ct Sapphire (Trillion, Blue, 6 x 6) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1ct Sapphire (Trillion, Blue, 7.03 x 7.03) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.33ct Sapphire (Trillion, Light Violet, 4.86 x 4.86) vs. 1ct Sapphire (Oval, Blue, 7 x 5)