2ct Diamond (Round, 8.15×8.22mm, White) vs 4ct Alexandrite (Cushion, 10×10mm, Bluish Green)
Quick summary: When looked from above (face-up position), 4ct Alexandrite (10×10mm, cushion cut) appears 71% larger than 2ct Diamond (8.15×8.22mm, round cut). See below how they compare side-by-side on a ring and finger.
| 2ct Diamond (round cut) |
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4ct Alexandrite (cushion cut) |
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white |
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| 8.15×8.22 mm | 10×10 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
2ct Diamond Round (8.15×8.22mm, White)
and
4ct Alexandrite Cushion (10×10mm, 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 Diamond for a given
carat weight, because it has higher specific gravity
(3.73 vs. 3.52 - this means it's "heavier" compared to Diamond 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.
| 2 Ct Diamond (Round) | 4 Ct Alexandrite (Cushion) | |
| 8.15×8.22 mm | vs | 10×10 mm |
| 52.62 mm² | 90 mm² |
| 2ct Diamond Round (8.15×8.22mm) | |
| 4ct Alexandrite Cushion (10×10mm) | |
| Difference: 71% (37.38 mm²) |
4ct Alexandrite (Cushion, 10×10mm) has approx. 71% more face-up area than 2ct Diamond (Round, 8.15×8.22mm).
Popular comparisons:
- 2ct Diamond (Round, White, 8.15 x 8.22) vs. 1.55ct Diamond (Round, Light Red, 7.49 x 7.52)
- 2ct Diamond (Round, White, 8.15 x 8.22) vs. 2.02ct Diamond (Oval, White, 10.18 x 7.18)
- 2ct Diamond (Round, White, 8.15 x 8.22) vs. 3.65ct Diamond (Pear, White, 14.61 x 8.39)
- 2ct Diamond (Round, White, 8.15 x 8.22) vs. 2ct Alexandrite (Cushion, Bluish Green, 8 x 8)
- 2ct Diamond (Round, White, 8.15 x 8.22) vs. 4ct Emerald (Emerald, Dark Bluish Green, 11.56 x 8.56)
- 2ct Diamond (Round, White, 8.15 x 8.22) vs. 7.68ct Ruby (Emerald, Red, 17 x 9)
- 2ct Diamond (Round, White, 8.15 x 8.22) vs. 3ct Diamond (Emerald, White, 9.64 x 7.14)
- 2ct Diamond (Round, White, 8.15 x 8.22) vs. 3ct Diamond (Oval, White, 11.7 x 7.8)