3ct Spinel (Round, 8.93×8.93mm, Red) vs 3ct Sapphire (Round, 8.62×8.62mm, Light Violet)
Quick summary: When looked from above (face-up position), 3ct Spinel (8.93×8.93mm, round cut) appears 7% larger than 3ct Sapphire (8.62×8.62mm, round cut). See below how they compare side-by-side on a ring and finger.
| 3ct Spinel (round cut) |
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3ct Sapphire (round cut) |
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red |
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| 8.93×8.93 mm | 8.62×8.62 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 Spinel Round (8.93×8.93mm, Red)
and
3ct Sapphire Round (8.62×8.62mm, Light Violet)
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 Spinel for a given
carat weight, because it has higher specific gravity
(4 vs. 3.6 - this means it's "heavier" compared to Spinel 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 Spinel (Round) | 3 Ct Sapphire (Round) | |
| 8.93×8.93 mm | vs | 8.62×8.62 mm |
| 62.63 mm² | 58.36 mm² |
| 3ct Spinel Round (8.93×8.93mm) | |
| 3ct Sapphire Round (8.62×8.62mm) | |
| Difference: 7% (4.27 mm²) |
3ct Spinel (Round, 8.93×8.93mm) has approx. 7% more face-up area than 3ct Sapphire (Round, 8.62×8.62mm).
Popular comparisons:
- 3ct Spinel (Round, Red, 8.93 x 8.93) vs. 3ct Diamond (Round, White, 9.37 x 9.37)
- 3ct Spinel (Round, Red, 8.93 x 8.93) vs. 0.5ct Chrysoberyl (Round, Light Yellowish Green, 4.87 x 4.87)
- 3ct Spinel (Round, Red, 8.93 x 8.93) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 3ct Spinel (Round, Red, 8.93 x 8.93) vs. 0.67ct Diamond (Round, White, 5.69 x 5.69)
- 3ct Spinel (Round, Red, 8.93 x 8.93) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 3ct Spinel (Round, Red, 8.93 x 8.93) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 3ct Spinel (Round, Red, 8.93 x 8.93) vs. 1ct Sapphire (Pear, Blue, 9.2 x 5.9)
- 3ct Spinel (Round, Red, 8.93 x 8.93) vs. 3ct Sapphire (Emerald, Yellow, 9.21 x 6.82)