3ct Sapphire (Round, 8.62×8.62mm, Blue) vs 3ct Topaz (Round, 8.99×8.99mm, Blue)
Quick summary: When looked from above (face-up position), 3ct Topaz (8.99×8.99mm, round cut) appears 9% larger than 3ct Sapphire (8.62×8.62mm, round cut). See below how they compare side-by-side on a ring and finger.
| 3ct Sapphire (round cut) |
vs
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3ct Topaz (round cut) |
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blue |
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| 8.62×8.62 mm | 8.99×8.99 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
3ct Sapphire Round (8.62×8.62mm, Blue)
and
3ct Topaz Round (8.99×8.99mm, 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.
| 3 Ct Sapphire (Round) | 3 Ct Topaz (Round) | |
| 8.62×8.62 mm | vs | 8.99×8.99 mm |
| 58.36 mm² | 63.48 mm² |
| 3ct Sapphire Round (8.62×8.62mm) | |
| 3ct Topaz Round (8.99×8.99mm) | |
| Difference: 9% (5.12 mm²) |
3ct Topaz (Round, 8.99×8.99mm) has approx. 9% more face-up area than 3ct Sapphire (Round, 8.62×8.62mm).
Popular comparisons:
- 3ct Sapphire (Round, Blue, 8.62 x 8.62) vs. 3ct Ruby (Round, Red, 8.62 x 8.62)
- 3ct Sapphire (Round, Blue, 8.62 x 8.62) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 3ct Sapphire (Round, Blue, 8.62 x 8.62) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 3ct Sapphire (Round, Blue, 8.62 x 8.62) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
- 3ct Sapphire (Round, Blue, 8.62 x 8.62) vs. 1.7ct Diamond (Round, White, 7.76 x 7.76)
- 3ct Sapphire (Round, Blue, 8.62 x 8.62) vs. 3ct Emerald (Round, Green, 9.83 x 9.83)
- 3ct Sapphire (Round, Blue, 8.62 x 8.62) vs. 3ct Sapphire (Oval, Blue, 10.91 x 7.27)
- 3ct Sapphire (Round, Blue, 8.62 x 8.62) vs. 4ct Sapphire (Oval, Blue, 11 x 8)
- 3ct Sapphire (Round, Blue, 8.62 x 8.62) vs. 0.4ct Diamond (Round, White, 4.79 x 4.79)