12.5ct Tanzanite (Emerald, 15.8×11.7mm, Blue) vs 12.5ct Diamond (Emerald, 15.51×11.49mm, White)
Quick summary: When looked from above (face-up position), 12.5ct Tanzanite (15.8×11.7mm, emerald cut) appears 4% larger than 12.5ct Diamond (15.51×11.49mm, emerald cut). See below how they compare side-by-side on a ring and finger.
| 12.5ct Tanzanite (emerald cut) |
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12.5ct Diamond (emerald cut) |
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| 15.8×11.7 mm | 15.51×11.49 mm | |
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Actual sizes of
12.5ct Tanzanite Emerald (15.8×11.7mm, Blue)
and
12.5ct Diamond Emerald (15.51×11.49mm, 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. 3.3 - 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.
| 12.5 Ct Tanzanite (Emerald) | 12.5 Ct Diamond (Emerald) | |
| 15.8×11.7 mm | vs | 15.51×11.49 mm |
| 171.92 mm² | 165.74 mm² |
| 12.5ct Tanzanite Emerald (15.8×11.7mm) | |
| 12.5ct Diamond Emerald (15.51×11.49mm) | |
| Difference: 4% (6.18 mm²) |
12.5ct Tanzanite Emerald (15.8×11.7mm) has approx. 4% more face-up area than 12.5ct Diamond Emerald (15.51×11.49mm).
Popular comparisons:
- 12.5ct Tanzanite (Emerald, Blue, 15.8 x 11.7) vs. 12.5ct Citrine (Emerald, Light Orange, 17 x 12.59)
- 2ct Tanzanite (Emerald, Blue, 8.57 x 6.35) vs. 3ct Tanzanite (Emerald, Blue, 9.81 x 7.27)
- 1ct Tanzanite (Emerald, Blue, 6.8 x 5.04) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 2ct Tanzanite (Emerald, Blue, 8.57 x 6.35) vs. 4ct Tanzanite (Emerald, Blue, 10.81 x 8.01)
- 0.49ct Tanzanite (Emerald, Blue, 5.37 x 3.98) vs. 0.5ct Emerald (Emerald, Green, 5.78 x 4.28)
- 1ct Tanzanite (Emerald, Blue, 6.8 x 5.04) vs. 1ct Diamond (Emerald, White, 6.68 x 4.95)
- 5ct Tanzanite (Emerald, Blue, 11.64 x 8.62) vs. 2ct Diamond (Marquise, White, 13.08 x 6.54)
- 2ct Tanzanite (Emerald, Blue, 8.57 x 6.35) vs. 2ct Diamond (Emerald, White, 8.42 x 6.24)
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Actual size is currently adjusted to screen.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.