1ct Topaz (Cabochon, 5×7mm, Light Bluish Green) vs 1ct Tourmaline (Cabochon, 6×6mm, Yellowish Green)
Quick summary: When looked from above (face-up position), 1ct Tourmaline (6×6mm, cabochon cut) appears 3% larger than 1ct Topaz (5×7mm, cabochon cut). See below how they compare side-by-side on a ring and finger.
| 1ct Topaz (cabochon cut) |
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1ct Tourmaline (cabochon cut) |
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light bluish green |
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| 5×7 mm | 6×6 mm | |
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Actual sizes of
1ct Topaz Cabochon (5×7mm, Light Bluish Green)
and
1ct Tourmaline Cabochon (6×6mm, Yellowish 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, Topaz will face-up smaller than Tourmaline for a given
carat weight, because it has higher specific gravity
(3.53 vs. 3.1 - this means it's "heavier" compared to Tourmaline 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 Ct Topaz (Cabochon) | 1 Ct Tourmaline (Cabochon) | |
| 5×7 mm | vs | 6×6 mm |
| 28.7 mm² | 29.52 mm² |
| 1ct Topaz Cabochon (5×7mm) | |
| 1ct Tourmaline Cabochon (6×6mm) | |
| Difference: 3% (0.82 mm²) |
1ct Tourmaline Cabochon (6×6mm) has approx. 3% more face-up area than 1ct Topaz Cabochon (5×7mm).
Popular comparisons:
- 1ct Topaz (Cabochon, Blue, 7.14 x 4.76) vs. 1ct Tanzanite (Cabochon, Blue, 7.29 x 4.86)
- 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)
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.