1.8ct Ruby (Oval, 9.2×6.13mm, Red) vs 1.08ct Diamond (Round, 6.67×6.67mm, White)
Quick summary: When looked from above (face-up position), 1.8ct Ruby (9.2×6.13mm, oval cut) appears 32% larger than 1.08ct Diamond (6.67×6.67mm, round cut). See below how they compare side-by-side on a ring and finger.
| 1.8ct Ruby (oval cut) |
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1.08ct Diamond (round cut) |
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red |
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| 9.2×6.13 mm | 6.67×6.67 mm | |
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Actual sizes of
1.8ct Ruby Oval (9.2×6.13mm, Red)
and
1.08ct Diamond Round (6.67×6.67mm, 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, Ruby will face-up smaller than Diamond for a given
carat weight, because it has higher specific gravity
(4 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.
| 1.8 Ct Ruby (Oval) | 1.08 Ct Diamond (Round) | |
| 9.2×6.13 mm | vs | 6.67×6.67 mm |
| 46.24 mm² | 34.94 mm² |
| 1.8ct Ruby Oval (9.2×6.13mm) | |
| 1.08ct Diamond Round (6.67×6.67mm) | |
| Difference: 32% (11.3 mm²) |
1.8ct Ruby Oval (9.2×6.13mm) has approx. 32% more face-up area than 1.08ct Diamond Round (6.67×6.67mm).
Popular comparisons:
- 1.8ct Ruby (Oval, Red, 9.2 x 6.13) vs. 1.25ct Diamond (Oval, White, 7 x 7)
- 1.8ct Ruby (Oval, Red, 9.2 x 6.13) vs. 1ct Diamond (Oval, White, 8.12 x 5.41)
- 1.8ct Ruby (Oval, Red, 9.2 x 6.13) vs. 1.8ct Emerald (Emerald, Green, 8.86 x 6.56)
- 1.8ct Ruby (Oval, Red, 9.2 x 6.13) vs. 2.8ct Diamond (Emerald, White, 9 x 7)
- 1.8ct Ruby (Oval, Red, 9.2 x 6.13) vs. 1.8ct Tourmaline (Oval, Violet, 10.02 x 6.68)
- 1.8ct Ruby (Oval, Red, 9.2 x 6.13) vs. 1.4ct Ruby (Oval, Red, 8.46 x 5.64)
- 1.8ct Ruby (Oval, Red, 9.2 x 6.13) vs. 1.5ct Ruby (Oval, Red, 8.66 x 5.77)
- 1.8ct Ruby (Oval, Red, 9.2 x 6.13) vs. 1.51ct Ruby (Oval, Red, 8.67 x 5.78)
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Actual size is currently adjusted to screen.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.