34ct Emerald (Cabochon, 25.28×16.85mm, Green) vs 20ct Diamond (Round, 17.64×17.64mm, White)
Quick summary: When looked from above (face-up position), 34ct Emerald (25.28×16.85mm, cabochon cut) appears 43% larger than 20ct Diamond (17.64×17.64mm, round cut). See below how they compare side-by-side on a ring and finger.
| 34ct Emerald (cabochon cut) |
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20ct Diamond (round cut) |
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| 25.28×16.85 mm | 17.64×17.64 mm | |
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Actual sizes of
34ct Emerald Cabochon (25.28×16.85mm, Green)
and
20ct Diamond Round (17.64×17.64mm, 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 Emerald for a given
carat weight, because it has higher specific gravity
(3.52 vs. 2.7 - this means it's "heavier" compared to Emerald 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.
| 34 Ct Emerald (Cabochon) | 20 Ct Diamond (Round) | |
| 25.28×16.85 mm | vs | 17.64×17.64 mm |
| 349.29 mm² | 244.39 mm² |
| 34ct Emerald Cabochon (25.28×16.85mm) | |
| 20ct Diamond Round (17.64×17.64mm) | |
| Difference: 43% (104.9 mm²) |
34ct Emerald Cabochon (25.28×16.85mm) has approx. 43% more face-up area than 20ct Diamond Round (17.64×17.64mm).
Popular comparisons:
- 5ct Emerald (Cabochon, Green, 10 x 10) vs. 5ct Diamond (Cabochon, White, 12.21 x 8.14)
- 1ct Emerald (Cabochon, Green, 8.2 x 6) vs. 1ct Emerald (Oval, Green, 8.63 x 5.75)
- 19.2ct Emerald (Cabochon, Dark Green, 20.9 x 13.93) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 5ct Emerald (Cabochon, Green, 10 x 10) vs. 5ct Diamond (Cabochon, White, 10 x 10)
- 5ct Emerald (Cabochon, Green, 13.34 x 8.89) vs. 6.7ct Sapphire (Cabochon, Blue, 12.9 x 8.6)
- 4.5ct Emerald (Cabochon, Green, 12.89 x 8.59) vs. 20ct Kunzite (Cushion, Light Purple, 16.38 x 16.38)
- 0.5ct Emerald (Cabochon, Green, 6.2 x 4.13) vs. 2ct Sapphire (Cabochon, Blue, 8.63 x 5.75)
- 10ct Emerald (Cabochon, Green, 16.82 x 11.21) vs. 6ct Emerald (Trillion, Green, 14.56 x 14.56)
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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.