15ct Diaspore (Heart, 16.29×16.29mm, Light Yellowish Green) vs 15ct Alexandrite (Heart, 15.8×15.8mm, Bluish Green)
Quick summary: When looked from above (face-up position), 15ct Diaspore (16.29×16.29mm, heart cut) appears 6% larger than 15ct Alexandrite (15.8×15.8mm, heart cut). See below how they compare side-by-side on a ring and finger.
| 15ct Diaspore (heart cut) |
vs
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15ct Alexandrite (heart cut) |
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light yellowish green |
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| 16.29×16.29 mm | 15.8×15.8 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
15ct Diaspore Heart (16.29×16.29mm, Light Yellowish Green)
and
15ct Alexandrite Heart (15.8×15.8mm, 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 Diaspore for a given
carat weight, because it has higher specific gravity
(3.73 vs. 3.4 - this means it's "heavier" compared to Diaspore 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.
| 15 Ct Diaspore (Heart) | 15 Ct Alexandrite (Heart) | |
| 16.29×16.29 mm | vs | 15.8×15.8 mm |
| 191.06 mm² | 179.74 mm² |
| 15ct Diaspore Heart (16.29×16.29mm) | |
| 15ct Alexandrite Heart (15.8×15.8mm) | |
| Difference: 6% (11.32 mm²) |
15ct Diaspore (Heart, 16.29×16.29mm) has approx. 6% more face-up area than 15ct Alexandrite (Heart, 15.8×15.8mm).
Popular comparisons:
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