1.25ct Topaz (Cabochon, 7.68×5.12mm, Blue) vs 1.25ct Rhodolite (Cabochon, 7.47×4.98mm, Purple)
Quick summary: When looked from above (face-up position), 1.25ct Topaz (7.68×5.12mm, cabochon cut) appears 6% larger than 1.25ct Rhodolite (7.47×4.98mm, cabochon cut). See below how they compare side-by-side on a ring and finger.
| 1.25ct Topaz (cabochon cut) |
vs
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1.25ct Rhodolite (cabochon cut) |
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blue |
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| 7.68×5.12 mm | 7.47×4.98 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
1.25ct Topaz Cabochon (7.68×5.12mm, Blue)
and
1.25ct Rhodolite Cabochon (7.47×4.98mm, Purple)
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, Rhodolite will face-up smaller than Topaz for a given
carat weight, because it has higher specific gravity
(3.84 vs. 3.53 - this means it's "heavier" compared to Topaz 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.
| 1.25 Ct Topaz (Cabochon) | 1.25 Ct Rhodolite (Cabochon) | |
| 7.68×5.12 mm | vs | 7.47×4.98 mm |
| 32.24 mm² | 30.5 mm² |
| 1.25ct Topaz Cabochon (7.68×5.12mm) | |
| 1.25ct Rhodolite Cabochon (7.47×4.98mm) | |
| Difference: 6% (1.74 mm²) |
1.25ct Topaz (Cabochon, 7.68×5.12mm) has approx. 6% more face-up area than 1.25ct Rhodolite (Cabochon, 7.47×4.98mm).
Popular comparisons:
- 1ct Topaz (Cabochon, Blue, 7.14 x 4.76) vs. 1ct Tanzanite (Cabochon, Blue, 7.29 x 4.86)
- 1ct Topaz (Cabochon, Light Bluish Green, 5 x 7) vs. 1ct Tourmaline (Cabochon, Yellowish Green, 6 x 6)
- 1ct Topaz (Cabochon, Blue, 7.14 x 4.76) vs. 0.5ct Topaz (Round, Blue, 5 x 5)
- 1ct Topaz (Cabochon, Blue, 7.14 x 4.76) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1ct Topaz (Cabochon, Light Bluish Green, 7.14 x 4.76) vs. 1ct Peridot (Cushion, Green, 6.5 x 4.5)
- 7.5ct Topaz (Cabochon, White, 13.97 x 9.31) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 25ct Topaz (Cabochon, Orange, 20.87 x 13.91) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 4.98ct Topaz (Cabochon, Blue, 12.18 x 8.12) vs. 4.13ct Topaz (Cabochon, Blue, 11.45 x 7.63)
- 1ct Topaz (Cabochon, Blue, 7.14 x 4.76) vs. 1ct Topaz (Princess, Bluish Green, 6 x 6)