0.5ct Tanzanite (Round, 5.06×5.06mm, Blue) vs 0.25ct Diamond (Round, 4.09×4.09mm, White)
Quick summary: When looked from above (face-up position), 0.5ct Tanzanite (5.06×5.06mm, round cut) appears 53% larger than 0.25ct Diamond (4.09×4.09mm, round cut). See below how they compare side-by-side on a ring and finger.
| 0.5ct Tanzanite (round cut) |
vs
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0.25ct Diamond (round cut) |
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blue |
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| 5.06×5.06 mm | 4.09×4.09 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
0.5ct Tanzanite Round (5.06×5.06mm, Blue)
and
0.25ct Diamond Round (4.09×4.09mm, 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, Diamond will face-up smaller than Tanzanite for a given
carat weight, because it has higher specific gravity
(3.52 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.
| 0.5 Ct Tanzanite (Round) | 0.25 Ct Diamond (Round) | |
| 5.06×5.06 mm | vs | 4.09×4.09 mm |
| 20.11 mm² | 13.14 mm² |
| 0.5ct Tanzanite Round (5.06×5.06mm) | |
| 0.25ct Diamond Round (4.09×4.09mm) | |
| Difference: 53% (6.97 mm²) |
0.5ct Tanzanite (Round, 5.06×5.06mm) has approx. 53% more face-up area than 0.25ct Diamond (Round, 4.09×4.09mm).
Popular comparisons:
- 0.5ct Tanzanite (Round, Blue, 5.06 x 5.06) vs. 0.5ct Diamond (Round, White, 5.16 x 5.16)
- 0.5ct Tanzanite (Round, Blue, 5.06 x 5.06) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 0.5ct Tanzanite (Round, Blue, 5.06 x 5.06) vs. 0.05ct Diamond (Round, White, 2.39 x 2.39)
- 0.5ct Tanzanite (Round, Blue, 5.06 x 5.06) vs. 0.4ct Emerald (Round, Green, 5.02 x 5.02)
- 0.5ct Tanzanite (Round, Blue, 5.06 x 5.06) vs. 0.7ct Tanzanite (Round, Blue, 5.66 x 5.66)
- 0.5ct Tanzanite (Round, Blue, 5.06 x 5.06) vs. 0.5ct Topaz (Round, Bluish Green, 4.95 x 4.95)
- 0.5ct Tanzanite (Round, Blue, 5.06 x 5.06) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.5ct Tanzanite (Round, Blue, 5.06 x 5.06) vs. 0.65ct Tanzanite (Round, Blue, 5.52 x 5.52)