1ct Topaz (Princess, 5.6×5.6mm, Blue) vs 1ct Diamond (Round, 6.5×6.5mm, White)
Quick summary: When looked from above (face-up position), 1ct Diamond (6.5×6.5mm, round cut) appears 6% larger than 1ct Topaz (5.6×5.6mm, princess cut). See below how they compare side-by-side on a ring and finger.
| 1ct Topaz (princess cut) |
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1ct Diamond (round cut) |
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blue |
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| 5.6×5.6 mm | 6.5×6.5 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 Princess (5.6×5.6mm, Blue)
and
1ct Diamond Round (6.5×6.5mm, White)
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 slightly smaller than Diamond for a given
carat weight, because it has higher specific gravity
(3.53 vs. 3.52 - this means it's "slightly heavier" compared to Diamond 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 (Princess) | 1 Ct Diamond (Round) | |
| 5.6×5.6 mm | vs | 6.5×6.5 mm |
| 31.36 mm² | 33.18 mm² |
| 1ct Topaz Princess (5.6×5.6mm) | |
| 1ct Diamond Round (6.5×6.5mm) | |
| Difference: 6% (1.82 mm²) |
1ct Diamond (Round, 6.5×6.5mm) has approx. 6% more face-up area than 1ct Topaz (Princess, 5.6×5.6mm).
Popular comparisons:
- 1ct Topaz (Princess, Blue, 5.6 x 5.6) vs. 1ct Diamond (Princess, White, 5.51 x 5.51)
- 1ct Topaz (Princess, Blue, 5.6 x 5.6) vs. 0.8ct Topaz (Princess, Blue, 5.2 x 5.2)
- 1ct Topaz (Princess, Blue, 5.6 x 5.6) vs. 1ct Tourmaline (Trillion, Bluish Green, 7.65 x 7.65)
- 1ct Topaz (Princess, Blue, 5.6 x 5.6) vs. 0.5ct Topaz (Round, Blue, 5 x 5)
- 1ct Topaz (Princess, Blue, 5.6 x 5.6) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 1ct Topaz (Princess, Blue, 5.6 x 5.6) vs. 1ct Tourmaline (Round, Violet, 6.51 x 6.51)
- 1ct Topaz (Princess, Blue, 5.6 x 5.6) vs. 1ct Tourmaline (Baguette, Violet, 7.55 x 5.03)
- 1ct Topaz (Princess, Blue, 5.6 x 5.6) vs. 1ct Tourmaline (Marquise, Violet, 10.74 x 5.37)