4ct Alexandrite (Round, 9.74×9.74mm, Bluish Green) vs 4ct Sapphire (Round, 9.49×9.49mm, Blue)
Quick summary: When looked from above (face-up position), 4ct Alexandrite (9.74×9.74mm, round cut) appears 5% larger than 4ct Sapphire (9.49×9.49mm, round cut). See below how they compare side-by-side on a ring and finger.
| 4ct Alexandrite (round cut) |
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4ct Sapphire (round cut) |
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bluish green |
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| 9.74×9.74 mm | 9.49×9.49 mm | |
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Actual sizes of
4ct Alexandrite Round (9.74×9.74mm, Bluish Green)
and
4ct Sapphire Round (9.49×9.49mm, 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. 3.7 - 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.
| 4 Ct Alexandrite (Round) | 4 Ct Sapphire (Round) | |
| 9.74×9.74 mm | vs | 9.49×9.49 mm |
| 74.51 mm² | 70.73 mm² |
| 4ct Alexandrite Round (9.74×9.74mm) | |
| 4ct Sapphire Round (9.49×9.49mm) | |
| Difference: 5% (3.78 mm²) |
4ct Alexandrite Round (9.74×9.74mm) has approx. 5% more face-up area than 4ct Sapphire Round (9.49×9.49mm).
Popular comparisons:
- 4ct Alexandrite (Round, Bluish Green, 9.74 x 9.74) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
- 4ct Alexandrite (Round, Bluish Green, 9.74 x 9.74) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 4ct Alexandrite (Round, Bluish Green, 9.74 x 9.74) vs. 4ct Emerald (Emerald, Green, 11.56 x 8.56)
- 4ct Alexandrite (Round, Bluish Green, 9.74 x 9.74) vs. 4ct Diamond (Round, White, 10.32 x 10.32)
- 4ct Alexandrite (Round, Bluish Green, 9.74 x 9.74) vs. 2ct Emerald (Round, Green, 8.59 x 8.59)
- 4ct Alexandrite (Round, Bluish Green, 9.74 x 9.74) vs. 1ct Diamond (Emerald, White, 6.68 x 4.95)
- 4ct Alexandrite (Round, Bluish Green, 9.74 x 9.74) vs. 0.5ct Diamond (Round, White, 5.16 x 5.16)
- 4ct Alexandrite (Round, Bluish Green, 9.74 x 9.74) vs. 1ct Alexandrite (Cabochon, Bluish Green, 7.02 x 4.68)
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Actual size is currently adjusted to screen.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.