5ct Alexandrite (Princess, 9.43×9.43mm, Bluish Green) vs 30ct Sapphire (Round, 18.58×18.58mm, Violet)
Quick summary: When looked from above (face-up position), 30ct Sapphire (18.58×18.58mm, round cut) appears 3.1 times larger than 5ct Alexandrite (9.43×9.43mm, princess cut). See below how they compare side-by-side on a ring and finger.
| 5ct Alexandrite (princess cut) |
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30ct Sapphire (round cut) |
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bluish green |
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| 9.43×9.43 mm | 18.58×18.58 mm | |
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Actual sizes of
5ct Alexandrite Princess (9.43×9.43mm, Bluish Green)
and
30ct Sapphire Round (18.58×18.58mm, 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 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.
| 5 Ct Alexandrite (Princess) | 30 Ct Sapphire (Round) | |
| 9.43×9.43 mm | vs | 18.58×18.58 mm |
| 88.92 mm² | 271.13 mm² |
| 5ct Alexandrite Princess (9.43×9.43mm) | |
| 30ct Sapphire Round (18.58×18.58mm) | |
| Difference: 205% (182.21 mm²) |
30ct Sapphire Round (18.58×18.58mm) has approx. 205% more face-up area than 5ct Alexandrite Princess (9.43×9.43mm). In other words, it's 3.05x larger.
Popular comparisons:
- 1ct Alexandrite (Princess, Bluish Green, 5.52 x 5.52) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.1ct Alexandrite (Princess, Bluish Green, 2.56 x 2.56) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 4.2ct Alexandrite (Princess, Violet, 8.9 x 8.9) vs. 5ct Alexandrite (Princess, Bluish Green, 9.43 x 9.43)
- 2ct Alexandrite (Princess, Bluish Green, 6.95 x 6.95) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1.63ct Alexandrite (Princess, Bluish Green, 6.49 x 6.49) vs. 1.28ct Alexandrite (Princess, Bluish Green, 5.99 x 5.99)
- 0.25ct Alexandrite (Princess, Bluish Green, 3.48 x 3.48) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.08ct Alexandrite (Princess, Bluish Green, 2.38 x 2.38) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 10ct Alexandrite (Princess, Bluish Green, 11.88 x 11.88) vs. 10ct Emerald (Emerald, Green, 15.69 x 11.62)
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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.