8.5ct Sapphire (Princess, 10.72×10.72mm, Blue) vs 8.5ct Topaz (Princess, 11.18×11.18mm, Blue)
Quick summary: When looked from above (face-up position), 8.5ct Topaz (11.18×11.18mm, princess cut) appears 9% larger than 8.5ct Sapphire (10.72×10.72mm, princess cut). See below how they compare side-by-side on a ring and finger.
| 8.5ct Sapphire (princess cut) |
vs
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8.5ct Topaz (princess cut) |
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blue |
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| 10.72×10.72 mm | 11.18×11.18 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 Princess (10.72×10.72mm, Blue)
and
8.5ct Topaz Princess (11.18×11.18mm, 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 (Princess) | 8.5 Ct Topaz (Princess) | |
| 10.72×10.72 mm | vs | 11.18×11.18 mm |
| 114.92 mm² | 124.99 mm² |
| 8.5ct Sapphire Princess (10.72×10.72mm) | |
| 8.5ct Topaz Princess (11.18×11.18mm) | |
| Difference: 9% (10.07 mm²) |
8.5ct Topaz (Princess, 11.18×11.18mm) has approx. 9% more face-up area than 8.5ct Sapphire (Princess, 10.72×10.72mm).
Popular comparisons:
- 1ct Sapphire (Princess, White, 5.37 x 5.37) vs. 1ct Diamond (Princess, White, 5.51 x 5.51)
- 0.5ct Sapphire (Princess, Dark Blue, 4.27 x 4.27) vs. 0.2ct Sapphire (Princess, Dark Blue, 3.14 x 3.14)
- 2ct Sapphire (Princess, Blue, 6.77 x 6.77) vs. 2ct Diamond (Princess, White, 6.94 x 6.94)
- 35ct Sapphire (Princess, Light Violet, 17.58 x 17.58) vs. 35ct Sapphire (Emerald, Blue, 20.88 x 15.47)
- 2ct Sapphire (Princess, Blue, 6.77 x 6.77) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
- 0.3ct Sapphire (Princess, Yellow, 3.6 x 3.6) vs. 0.2ct Sapphire (Round, Blue, 3.5 x 3.5)
- 0.5ct Sapphire (Princess, White, 4.27 x 4.27) vs. 0.05ct Diamond (Princess, White, 2.03 x 2.03)
- 1.49ct Sapphire (Princess, Yellow, 6.14 x 6.14) vs. 2.38ct Diamond (Round, White, 8.68 x 8.68)
- 2.2ct Sapphire (Princess, Blue, 6.99 x 6.99) vs. 2.2ct Diamond (Princess, White, 7.17 x 7.17)