3.5ct Diamond (Princess, 8.37×8.37mm, White) vs 1.86ct Alexandrite (Princess, 7×7mm, Bluish Green)
Quick summary: When looked from above (face-up position), 3.5ct Diamond (8.37×8.37mm, princess cut) appears 43% larger than 1.86ct Alexandrite (7×7mm, princess cut). See below how they compare side-by-side on a ring and finger.
| 3.5ct Diamond (princess cut) |
vs
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1.86ct Alexandrite (princess cut) |
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white |
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| 8.37×8.37 mm | 7×7 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
3.5ct Diamond Princess (8.37×8.37mm, White)
and
1.86ct Alexandrite Princess (7×7mm, 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.
| 3.5 Ct Diamond (Princess) | 1.86 Ct Alexandrite (Princess) | |
| 8.37×8.37 mm | vs | 7×7 mm |
| 70.06 mm² | 49 mm² |
| 3.5ct Diamond Princess (8.37×8.37mm) | |
| 1.86ct Alexandrite Princess (7×7mm) | |
| Difference: 43% (21.06 mm²) |
3.5ct Diamond (Princess, 8.37×8.37mm) has approx. 43% more face-up area than 1.86ct Alexandrite (Princess, 7×7mm).
Popular comparisons:
- 3.5ct Diamond (Princess, White, 8.37 x 8.37) vs. 3.5ct Sapphire (Princess, White, 8.16 x 8.16)
- 0.2ct Diamond (Princess, White, 3.22 x 3.22) vs. 0.3ct Diamond (Princess, White, 3.69 x 3.69)
- 0.7ct Diamond (Princess, White, 4.83 x 4.82) vs. 0.7ct Diamond (Princess, White, 4.82 x 4.77)
- 1.53ct Diamond (Princess, White, 6.34 x 6.39) vs. 1.24ct Diamond (Emerald, White, 6.01 x 6.12)
- 0.7ct Diamond (Princess, White, 4.83 x 4.82) vs. 0.6ct Diamond (Round, White, 5.45 x 5.46)
- 0.37ct Diamond (Princess, White, 3.96 x 3.96) vs. 1ct Sapphire (Princess, White, 5.37 x 5.37)
- 1ct Diamond (Princess, White, 5.51 x 5.51) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.7ct Diamond (Princess, White, 4.83 x 4.82) vs. 0.61ct Diamond (Round, White, 5.42 x 5.44)