1.3ct Sapphire (Round, 6.52×6.52mm, Blue) vs 1.25ct Diamond (Oval, 8.75×5.83mm, White)
Quick summary: When looked from above (face-up position), 1.25ct Diamond (8.75×5.83mm, oval cut) appears 25% larger than 1.3ct Sapphire (6.52×6.52mm, round cut). See below how they compare side-by-side on a ring and finger.
| 1.3ct Sapphire (round cut) |
vs
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1.25ct Diamond (oval cut) |
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blue |
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| 6.52×6.52 mm | 8.75×5.83 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
1.3ct Sapphire Round (6.52×6.52mm, Blue)
and
1.25ct Diamond Oval (8.75×5.83mm, White)
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 Diamond for a given
carat weight, because it has higher specific gravity
(4 vs. 3.52 - this means it's "heavier" compared to Diamond 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.
| 1.3 Ct Sapphire (Round) | 1.25 Ct Diamond (Oval) | |
| 6.52×6.52 mm | vs | 8.75×5.83 mm |
| 33.39 mm² | 41.83 mm² |
| 1.3ct Sapphire Round (6.52×6.52mm) | |
| 1.25ct Diamond Oval (8.75×5.83mm) | |
| Difference: 25% (8.44 mm²) |
1.25ct Diamond (Oval, 8.75×5.83mm) has approx. 25% more face-up area than 1.3ct Sapphire (Round, 6.52×6.52mm).
Popular comparisons:
- 1.3ct Sapphire (Round, Blue, 6.52 x 6.52) vs. 1.2ct Diamond (Round, White, 6.91 x 6.91)
- 1.3ct Sapphire (Round, Blue, 6.52 x 6.52) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 1.3ct Sapphire (Round, Blue, 6.52 x 6.52) vs. 1.7ct Sapphire (Round, Blue, 6.52 x 6.52)
- 1.3ct Sapphire (Round, Blue, 6.52 x 6.52) vs. 1.3ct Diamond (Round, White, 7.09 x 7.09)
- 1.3ct Sapphire (Round, Blue, 6.52 x 6.52) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1.3ct Sapphire (Round, Blue, 6.52 x 6.52) vs. 0.7ct Diamond (Round, White, 5.77 x 5.77)
- 1.3ct Sapphire (Round, Blue, 6.52 x 6.52) vs. 1.2ct Sapphire (Round, Blue, 6.35 x 6.35)
- 1.3ct Sapphire (Round, Blue, 6.52 x 6.52) vs. 1.7ct Diamond (Round, White, 7.76 x 7.76)