12ct Alexandrite (Cabochon, 14×11mm, Light Bluish Green) vs 4ct Sapphire (Oval, 11×9mm, Dark Blue)
Quick summary: When looked from above (face-up position), 12ct Alexandrite (14×11mm, cabochon cut) appears 56% larger than 4ct Sapphire (11×9mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 12ct Alexandrite (cabochon cut) |
vs
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4ct Sapphire (oval cut) |
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light bluish green |
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| 14×11 mm | 11×9 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
12ct Alexandrite Cabochon (14×11mm, Light Bluish Green)
and
4ct Sapphire Oval (11×9mm, Dark 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 Alexandrite for a given
carat weight, because it has higher specific gravity
(4 vs. 3.73 - this means it's "heavier" compared to Alexandrite 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.
| 12 Ct Alexandrite (Cabochon) | 4 Ct Sapphire (Oval) | |
| 14×11 mm | vs | 11×9 mm |
| 126.28 mm² | 81.18 mm² |
| 12ct Alexandrite Cabochon (14×11mm) | |
| 4ct Sapphire Oval (11×9mm) | |
| Difference: 56% (45.1 mm²) |
12ct Alexandrite (Cabochon, 14×11mm) has approx. 56% more face-up area than 4ct Sapphire (Oval, 11×9mm).
Popular comparisons:
- 12ct Alexandrite (Cabochon, Light Bluish Green, 14 x 11) vs. 4ct Sapphire (Oval, Dark Blue, 10 x 8)
- 12ct Alexandrite (Cabochon, Light Bluish Green, 14 x 11) vs. 4ct Sapphire (Oval, Dark Blue, 11 x 10)
- 1ct Alexandrite (Cabochon, Dark Purple, 7.02 x 4.68) vs. 1ct Alexandrite (Trillion, Bluish Green, 7.21 x 7.21)
- 1ct Alexandrite (Cabochon, Bluish Green, 7.02 x 4.68) vs. 1ct Emerald (Cabochon, Green, 7.8 x 5.2)
- 1ct Alexandrite (Cabochon, Bluish Green, 7.02 x 4.68) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 12ct Alexandrite (Cabochon, Bluish Green, 16.08 x 10.72) vs. 1ct Alexandrite (Emerald, Bluish Green, 6.55 x 4.85)
- 3.24ct Alexandrite (Cabochon, Bluish Green, 10.4 x 6.93) vs. 3.24ct Tanzanite (Oval, Blue, 11.94 x 7.96)
- 1ct Alexandrite (Cabochon, Bluish Green, 7 x 5) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)