1ct Tanzanite (Oval, 8.13×5.42mm, Blue) vs 1ct Topaz (Oval, 8×5.33mm, Blue)
Quick summary: When looked from above (face-up position), 1ct Tanzanite (8.13×5.42mm, oval cut) appears 3% larger than 1ct Topaz (8×5.33mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 1ct Tanzanite (oval cut) |
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1ct Topaz (oval cut) |
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blue |
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| 8.13×5.42 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 Tanzanite Oval (8.13×5.42mm, Blue)
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 Tanzanite for a given
carat weight, because it has higher specific gravity
(3.53 vs. 3.35 - this means it's "heavier" compared to Tanzanite 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 Tanzanite (Oval) | 1 Ct Topaz (Oval) | |
| 8.13×5.42 mm | vs | 8×5.33 mm |
| 36.13 mm² | 34.96 mm² |
| 1ct Tanzanite Oval (8.13×5.42mm) | |
| 1ct Topaz Oval (8×5.33mm) | |
| Difference: 3% (1.17 mm²) |
1ct Tanzanite (Oval, 8.13×5.42mm) has approx. 3% more face-up area than 1ct Topaz (Oval, 8×5.33mm).
Popular comparisons:
- 1ct Tanzanite (Oval, Blue, 8.13 x 5.42) vs. 1ct Emerald (Emerald, Green, 7.26 x 5.38)
- 1ct Tanzanite (Oval, Blue, 8.07 x 5.38) vs. 1ct Morganite (Oval, Light Purple, 8.63 x 5.75)
- 2ct Tanzanite (Oval, Blue, 10.16 x 6.77) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
- 2.5ct Tanzanite (Oval, Blue, 10.95 x 7.3) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
- 4.5ct Tanzanite (Oval, Blue, 12 x 10) vs. 5ct Tanzanite (Cushion, Blue, 12 x 8)
- 1ct Tanzanite (Oval, Blue, 8.07 x 5.38) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 20ct Tanzanite (Oval, Blue, 21.89 x 14.59) vs. 20.5ct Tanzanite (Oval, Blue, 22.07 x 14.71)
- 1ct Tanzanite (Oval, Blue, 8.07 x 5.38) vs. 2ct Sapphire (Oval, Blue, 9.53 x 6.35)
- 0.8ct Tanzanite (Oval, Blue, 7.49 x 4.99) vs. 1.3ct Tanzanite (Round, Blue, 6.96 x 6.96)