6ct Ruby (Round, 10.86×10.86mm, Red) vs 5ct Alexandrite (Oval, 11.8×8.85mm, Bluish Green)
Quick summary: When looked from above (face-up position), 6ct Ruby (10.86×10.86mm, round cut) appears 8% larger than 5ct Alexandrite (11.8×8.85mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 6ct Ruby (round cut) |
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5ct Alexandrite (oval cut) |
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red |
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| 10.86×10.86 mm | 11.8×8.85 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
6ct Ruby Round (10.86×10.86mm, Red)
and
5ct Alexandrite Oval (11.8×8.85mm, 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, Ruby will face-up smaller than Alexandrite for a given
carat weight, because it has higher specific gravity
(4 vs. 3.73 - 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.
| 6 Ct Ruby (Round) | 5 Ct Alexandrite (Oval) | |
| 10.86×10.86 mm | vs | 11.8×8.85 mm |
| 92.63 mm² | 85.63 mm² |
| 6ct Ruby Round (10.86×10.86mm) | |
| 5ct Alexandrite Oval (11.8×8.85mm) | |
| Difference: 8% (7 mm²) |
6ct Ruby (Round, 10.86×10.86mm) has approx. 8% more face-up area than 5ct Alexandrite (Oval, 11.8×8.85mm).
Popular comparisons:
- 6ct Ruby (Round, Red, 10.86 x 10.86) vs. 0.95ct Sapphire (Round, Blue, 7 x 5)
- 6ct Ruby (Round, Red, 10.86 x 10.86) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 6ct Ruby (Round, Red, 10.86 x 10.86) vs. 5ct Diamond (Round, White, 11.11 x 11.11)
- 6ct Ruby (Round, Red, 10.86 x 10.86) vs. 6ct Diamond (Round, White, 11.81 x 11.81)
- 6ct Ruby (Round, Red, 10.86 x 10.86) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 6ct Ruby (Round, Red, 10.86 x 10.86) vs. 1ct Alexandrite (Emerald, Bluish Green, 6.55 x 4.85)
- 6ct Ruby (Round, Red, 10.86 x 10.86) vs. 5ct Alexandrite (Oval, Bluish Green, 13.28 x 8.85)
- 6ct Ruby (Round, Red, 10.86 x 10.86) vs. 4ct Sapphire (Cushion, Blue, 8.88 x 8.88)