4.5ct Alexandrite (Emerald, 10.79×7.99mm, Bluish Green) vs 4.5ct Sapphire (Emerald, 10.54×7.81mm, Blue)
Quick summary: When looked from above (face-up position), 4.5ct Alexandrite (10.79×7.99mm, emerald cut) appears 5% larger than 4.5ct Sapphire (10.54×7.81mm, emerald cut). See below how they compare side-by-side on a ring and finger.
| 4.5ct Alexandrite (emerald cut) |
vs
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4.5ct Sapphire (emerald cut) |
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bluish green |
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| 10.79×7.99 mm | 10.54×7.81 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
4.5ct Alexandrite Emerald (10.79×7.99mm, Bluish Green)
and
4.5ct Sapphire Emerald (10.54×7.81mm, 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.
| 4.5 Ct Alexandrite (Emerald) | 4.5 Ct Sapphire (Emerald) | |
| 10.79×7.99 mm | vs | 10.54×7.81 mm |
| 80.18 mm² | 76.56 mm² |
| 4.5ct Alexandrite Emerald (10.79×7.99mm) | |
| 4.5ct Sapphire Emerald (10.54×7.81mm) | |
| Difference: 5% (3.62 mm²) |
4.5ct Alexandrite (Emerald, 10.79×7.99mm) has approx. 5% more face-up area than 4.5ct Sapphire (Emerald, 10.54×7.81mm).
Popular comparisons:
- 29ct Alexandrite (Emerald, Bluish Green, 20 x 15) vs. 7.9ct Alexandrite (Emerald, Bluish Green, 12.2 x 9.8)
- 1ct Alexandrite (Emerald, Bluish Green, 6.55 x 4.85) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 7.05ct Alexandrite (Emerald, Violet, 12 x 10) vs. 5ct Alexandrite (Emerald, Bluish Green, 11 x 9)
- 4.2ct Alexandrite (Emerald, Violet, 10 x 8) vs. 5ct Alexandrite (Emerald, Bluish Green, 11 x 9)
- 29ct Alexandrite (Emerald, Bluish Green, 20 x 15) vs. 10ct Alexandrite (Round, Light Bluish Green, 10 x 15)
- 1.9ct Alexandrite (Emerald, Bluish Green, 8.11 x 6.01) vs. 7.9ct Alexandrite (Emerald, Bluish Green, 12.2 x 9.8)
- 6ct Alexandrite (Emerald, Dark Violet, 11.91 x 8.82) vs. 6ct Sapphire (Round, Purple, 10.86 x 10.86)
- 0.5ct Alexandrite (Emerald, Dark Violet, 5.2 x 3.85) vs. 0.5ct Tourmaline (Cushion, Light Green , 4.83 x 4.83)
- 1.9ct Alexandrite (Emerald, Bluish Green, 8.11 x 6.01) vs. 5ct Alexandrite (Emerald, Bluish Green, 11 x 9)