4ct Aquamarine (Cushion, 10.12×10.12mm, Light Blue) vs 4ct Diamond (Cushion, 9.25×9.25mm, White)
Quick summary: When looked from above (face-up position), 4ct Aquamarine (10.12×10.12mm, cushion cut) appears 20% larger than 4ct Diamond (9.25×9.25mm, cushion cut). See below how they compare side-by-side on a ring and finger.
| 4ct Aquamarine (cushion cut) |
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4ct Diamond (cushion cut) |
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light blue |
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| 10.12×10.12 mm | 9.25×9.25 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
4ct Aquamarine Cushion (10.12×10.12mm, Light Blue)
and
4ct Diamond Cushion (9.25×9.25mm, White)
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, Diamond will face-up smaller than Aquamarine for a given
carat weight, because it has higher specific gravity
(3.52 vs. 2.72 - this means it's "heavier" compared to Aquamarine 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 Aquamarine (Cushion) | 4 Ct Diamond (Cushion) | |
| 10.12×10.12 mm | vs | 9.25×9.25 mm |
| 92.17 mm² | 77.01 mm² |
| 4ct Aquamarine Cushion (10.12×10.12mm) | |
| 4ct Diamond Cushion (9.25×9.25mm) | |
| Difference: 20% (15.16 mm²) |
4ct Aquamarine (Cushion, 10.12×10.12mm) has approx. 20% more face-up area than 4ct Diamond (Cushion, 9.25×9.25mm).
Popular comparisons:
- 4ct Aquamarine (Cushion, Light Blue, 10.12 x 10.12) vs. 3ct Emerald (Emerald, Green, 10.5 x 7.78)
- 4ct Aquamarine (Cushion, Light Blue, 10.12 x 10.12) vs. 4ct Peridot (Cushion, Yellowish Green, 9.42 x 9.42)
- 4ct Aquamarine (Cushion, Light Blue, 10.12 x 10.12) vs. 5ct Diamond (Cushion, White, 9.96 x 9.96)
- 4ct Aquamarine (Cushion, Light Blue, 10.12 x 10.12) vs. 4ct Diamond (Cushion, Light Blue, 9.25 x 9.25)
- 4ct Aquamarine (Cushion, Light Blue, 10.12 x 10.12) vs. 2ct Aquamarine (Round, Light Blue, 8.59 x 8.59)
- 4ct Aquamarine (Cushion, Light Blue, 10.12 x 10.12) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 4ct Aquamarine (Cushion, Light Blue, 10.12 x 10.12) vs. 3.9ct Diamond (Emerald, White, 10.52 x 7.79)
- 4ct Aquamarine (Cushion, Light Blue, 10.12 x 10.12) vs. 3.9ct Diamond (Baguette, White, 11.39 x 7.59)