1ct Topaz (Oval, 7.89×5.26mm, Blue) vs 1ct Ruby (Oval, 7.56×5.04mm, Red)
Quick summary: When looked from above (face-up position), 1ct Topaz (7.89×5.26mm, oval cut) appears 9% larger than 1ct Ruby (7.56×5.04mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 1ct Topaz (oval cut) |
vs
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1ct Ruby (oval cut) |
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blue |
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| 7.89×5.26 mm | 7.56×5.04 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 Topaz Oval (7.89×5.26mm, Blue)
and
1ct Ruby Oval (7.56×5.04mm, Red)
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, Ruby will face-up smaller than Topaz for a given
carat weight, because it has higher specific gravity
(4 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 Ct Topaz (Oval) | 1 Ct Ruby (Oval) | |
| 7.89×5.26 mm | vs | 7.56×5.04 mm |
| 34.03 mm² | 31.24 mm² |
| 1ct Topaz Oval (7.89×5.26mm) | |
| 1ct Ruby Oval (7.56×5.04mm) | |
| Difference: 9% (2.79 mm²) |
1ct Topaz (Oval, 7.89×5.26mm) has approx. 9% more face-up area than 1ct Ruby (Oval, 7.56×5.04mm).
Popular comparisons:
- 1ct Topaz (Oval, Blue, 7.89 x 5.26) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 1ct Topaz (Oval, Blue, 7.89 x 5.26) vs. 1ct Diamond (Oval, White, 8.12 x 5.41)
- 1ct Topaz (Oval, Blue, 7.89 x 5.26) vs. 0.5ct Diamond (Round, White, 5.16 x 5.16)
- 1ct Topaz (Oval, Blue, 7.89 x 5.26) vs. 1ct Tourmaline (Oval, Blue, 8.24 x 5.49)
- 1ct Topaz (Oval, Blue, 7.89 x 5.26) vs. 1ct Tanzanite (Oval, Blue, 8.07 x 5.38)
- 1ct Topaz (Oval, Blue, 7.89 x 5.26) vs. 1ct Sapphire (Oval, Blue, 7.56 x 5.04)
- 1ct Topaz (Oval, Blue, 7.89 x 5.26) vs. 0.1ct Emerald (Round, Green, 3.16 x 3.16)
- 1ct Topaz (Oval, Blue, 7.89 x 5.26) vs. 1.75ct Ruby (Emerald, Red, 7.7 x 5.7)