3.7ct Topaz (Oval, 12.2×8.13mm, Blue) vs 7.8ct Topaz (Oval, 15.65×10.43mm, Blue)
Quick summary: When looked from above (face-up position), 7.8ct Topaz (15.65×10.43mm, oval cut) appears 65% larger than 3.7ct Topaz (12.2×8.13mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 3.7ct Topaz (oval cut) |
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7.8ct Topaz (oval cut) |
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| 12.2×8.13 mm | 15.65×10.43 mm | |
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Actual sizes of
3.7ct Topaz Oval (12.2×8.13mm, Blue)
and
7.8ct Topaz Oval (15.65×10.43mm, Blue)
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
The face-up size depends on the shape of the gem, its weight and 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.
| 3.7 Ct Topaz (Oval) | 7.8 Ct Topaz (Oval) | |
| 12.2×8.13 mm | vs | 15.65×10.43 mm |
| 81.33 mm² | 133.85 mm² |
| 3.7ct Topaz Oval (12.2×8.13mm) | |
| 7.8ct Topaz Oval (15.65×10.43mm) | |
| Difference: 65% (52.52 mm²) |
7.8ct Topaz Oval (15.65×10.43mm) has approx. 65% more face-up area than 3.7ct Topaz Oval (12.2×8.13mm).
Popular comparisons:
- 3.7ct Topaz (Oval, Blue, 12.2 x 8.13) vs. 1ct Topaz (Oval, Blue, 7.89 x 5.26)
- 2.5ct Topaz (Oval, Blue, 10.7 x 7.13) vs. 6.25ct Diamond (Round, White, 11.97 x 11.97)
- 6ct Topaz (Oval, Blue, 14.33 x 9.55) vs. 6ct Diamond (Oval, White, 14.75 x 9.83)
- 3ct Topaz (Oval, Blue, 11 x 9) vs. 4ct Topaz (Oval, Blue, 12 x 10)
- 30ct Topaz (Oval, Blue, 24.5 x 16.33) vs. 10ct Aquamarine (Emerald, Light Bluish Green, 15.69 x 11.62)
- 25ct Topaz (Oval, Blue, 23.06 x 15.37) vs. 25ct Diamond (Oval, White, 23.73 x 15.82)
- 2ct Topaz (Oval, Blue, 9.93 x 6.62) vs. 0.41ct Topaz (Round, White, 4.63 x 4.63)
- 2ct Topaz (Oval, Blue, 9.93 x 6.62) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
Enter your screen size (diagonal)
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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.