3.5ct Spinel (Oval, 12.06×8.04mm, Red) vs 3.5ct Alexandrite (Oval, 11.91×7.94mm, Bluish Green)
Quick summary: When looked from above (face-up position), 3.5ct Spinel (12.06×8.04mm, oval cut) appears 3% larger than 3.5ct Alexandrite (11.91×7.94mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 3.5ct Spinel (oval cut) |
vs
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3.5ct Alexandrite (oval cut) |
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red |
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| 12.06×8.04 mm | 11.91×7.94 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
3.5ct Spinel Oval (12.06×8.04mm, Red)
and
3.5ct Alexandrite Oval (11.91×7.94mm, Bluish Green)
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, Alexandrite will face-up smaller than Spinel for a given
carat weight, because it has higher specific gravity
(3.73 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.
| 3.5 Ct Spinel (Oval) | 3.5 Ct Alexandrite (Oval) | |
| 12.06×8.04 mm | vs | 11.91×7.94 mm |
| 79.51 mm² | 77.54 mm² |
| 3.5ct Spinel Oval (12.06×8.04mm) | |
| 3.5ct Alexandrite Oval (11.91×7.94mm) | |
| Difference: 3% (1.97 mm²) |
3.5ct Spinel (Oval, 12.06×8.04mm) has approx. 3% more face-up area than 3.5ct Alexandrite (Oval, 11.91×7.94mm).
Popular comparisons:
- 1ct Spinel (Oval, Light Blue, 7.83 x 5.22) vs. 1ct Topaz (Oval, Gray, 7.89 x 5.26)
- 1.21ct Spinel (Oval, Red, 8 x 6) vs. 0.5ct Emerald (Trillion, Green, 6.36 x 6.36)
- 3.12ct Spinel (Oval, Purple, 10 x 8) vs. 3ct Spinel (Cushion, Light Purple, 11 x 8)
- 3ct Spinel (Oval, Light Violet, 11 x 7.53) vs. 3ct Spinel (Cushion, Light Violet, 10 x 8)
- 3.12ct Spinel (Oval, Red, 10 x 8) vs. 3ct Spinel (Cushion, Light Purple, 11 x 8)
- 2.48ct Spinel (Oval, Light Purple, 9.2 x 7.2) vs. 3ct Spinel (Round, Light Purple, 8.93 x 8.93)
- 1ct Spinel (Oval, Red, 7.83 x 5.22) vs. 1ct Tanzanite (Oval, Blue, 8.07 x 5.38)
- 3ct Spinel (Oval, Light Purple, 11.3 x 7.53) vs. 4ct Sapphire (Cushion, Light Purple, 11 x 9)
- 3ct Spinel (Oval, Light Purple, 11.3 x 7.53) vs. 3ct Spinel (Round, Light Purple, 8.93 x 8.93)