1ct Tourmaline (Oval, 8.39×5.59mm, Purple) vs 1ct Topaz (Oval, 8×5.33mm, Blue)
Quick summary: When looked from above (face-up position), 1ct Tourmaline (8.39×5.59mm, oval cut) appears 10% larger than 1ct Topaz (8×5.33mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 1ct Tourmaline (oval cut) |
vs
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1ct Topaz (oval cut) |
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purple |
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| 8.39×5.59 mm | 8×5.33 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
1ct Tourmaline Oval (8.39×5.59mm, Purple)
and
1ct Topaz Oval (8×5.33mm, 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
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. 3.06 - 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 Tourmaline (Oval) | 1 Ct Topaz (Oval) | |
| 8.39×5.59 mm | vs | 8×5.33 mm |
| 38.46 mm² | 34.96 mm² |
| 1ct Tourmaline Oval (8.39×5.59mm) | |
| 1ct Topaz Oval (8×5.33mm) | |
| Difference: 10% (3.5 mm²) |
1ct Tourmaline (Oval, 8.39×5.59mm) has approx. 10% more face-up area than 1ct Topaz (Oval, 8×5.33mm).
Popular comparisons:
- 5.8ct Tourmaline (Oval, Violet, 14.79 x 9.86) vs. 8ct Sapphire (Oval, Blue, 15.12 x 10.08)
- 14ct Tourmaline (Oval, Light Purple, 19.85 x 14) vs. 14ct Kunzite (Oval, Light Purple, 19.68 x 14)
- 3ct Tourmaline (Oval, White, 11.88 x 7.92) vs. 4.5ct Diamond (Oval, White, 13.4 x 8.93)
- 2.84ct Tourmaline (Oval, Violet, 11.66 x 7.77) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 8.8ct Tourmaline (Oval, Dark Yellowish Green, 15.22 x 11.45) vs. 6.54ct Sapphire (Pear, Dark Green, 12.83 x 9.31)
- 1ct Tourmaline (Oval, Red, 8.24 x 5.49) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 2.89ct Tourmaline (Oval, Red, 10.74 x 7.74) vs. 0.49ct Ruby (Oval, Red, 4.96 x 3.96)
- 3.5ct Tourmaline (Oval, Light Green , 12.5 x 8.33) vs. 3.5ct Diamond (Round, White, 9.87 x 9.87)
- 1ct Tourmaline (Oval, Violet, 8.24 x 5.49) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)