1ct Tourmaline (Round, 6.51×6.51mm, Violet) vs 1ct Tanzanite (Trillion, 7.49×7.49mm, Blue)
Quick summary: When looked from above (face-up position), 1ct Tanzanite (7.49×7.49mm, trillion cut) appears 4% larger than 1ct Tourmaline (6.51×6.51mm, round cut). See below how they compare side-by-side on a ring and finger.
| 1ct Tourmaline (round cut) |
vs
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1ct Tanzanite (trillion cut) |
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violet |
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| 6.51×6.51 mm | 7.49×7.49 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 Round (6.51×6.51mm, Violet)
and
1ct Tanzanite Trillion (7.49×7.49mm, 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, Tanzanite will face-up smaller than Tourmaline for a given
carat weight, because it has higher specific gravity
(3.35 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 (Round) | 1 Ct Tanzanite (Trillion) | |
| 6.51×6.51 mm | vs | 7.49×7.49 mm |
| 33.29 mm² | 34.78 mm² |
| 1ct Tourmaline Round (6.51×6.51mm) | |
| 1ct Tanzanite Trillion (7.49×7.49mm) | |
| Difference: 4% (1.49 mm²) |
1ct Tanzanite (Trillion, 7.49×7.49mm) has approx. 4% more face-up area than 1ct Tourmaline (Round, 6.51×6.51mm).
Popular comparisons:
- 1ct Tourmaline (Round, Violet, 6.51 x 6.51) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 1ct Tourmaline (Round, Violet, 6.51 x 6.51) vs. 1ct Amethyst (Cushion, Light Purple, 6.41 x 6.41)
- 1ct Tourmaline (Round, Violet, 6.51 x 6.51) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1ct Tourmaline (Round, Violet, 6.51 x 6.51) vs. 1ct Emerald (Round, Green, 6.82 x 6.82)
- 1ct Tourmaline (Round, Violet, 6.51 x 6.51) vs. 1.02ct Sapphire (Round, Blue, 6.02 x 6.02)
- 1ct Tourmaline (Round, Violet, 6.51 x 6.51) vs. 1ct Tourmaline (Emerald, Violet, 6.95 x 5.15)
- 1ct Tourmaline (Round, Violet, 6.51 x 6.51) vs. 1ct Zircon (Round, Orange, 5.69 x 5.69)
- 1ct Tourmaline (Round, Violet, 6.51 x 6.51) vs. 2ct Diamond (Round, White, 8.19 x 8.19)