4ct Amethyst (Emerald, 11.62×8.61mm, Violet) vs 4ct Tanzanite (Emerald, 10.76×7.97mm, Blue)
Quick summary: When looked from above (face-up position), 4ct Amethyst (11.62×8.61mm, emerald cut) appears 17% larger than 4ct Tanzanite (10.76×7.97mm, emerald cut). See below how they compare side-by-side on a ring and finger.
| 4ct Amethyst (emerald cut) |
vs
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4ct Tanzanite (emerald cut) |
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violet |
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| 11.62×8.61 mm | 10.76×7.97 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
4ct Amethyst Emerald (11.62×8.61mm, Violet)
and
4ct Tanzanite Emerald (10.76×7.97mm, 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, Tanzanite will face-up smaller than Amethyst for a given
carat weight, because it has higher specific gravity
(3.35 vs. 2.65 - this means it's "heavier" compared to Amethyst 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.
| 4 Ct Amethyst (Emerald) | 4 Ct Tanzanite (Emerald) | |
| 11.62×8.61 mm | vs | 10.76×7.97 mm |
| 93.04 mm² | 79.75 mm² |
| 4ct Amethyst Emerald (11.62×8.61mm) | |
| 4ct Tanzanite Emerald (10.76×7.97mm) | |
| Difference: 17% (13.29 mm²) |
4ct Amethyst (Emerald, 11.62×8.61mm) has approx. 17% more face-up area than 4ct Tanzanite (Emerald, 10.76×7.97mm).
Popular comparisons:
- 4ct Amethyst (Emerald, Violet, 11.62 x 8.61) vs. 4ct Diamond (Emerald, Purple, 10.61 x 7.86)
- 4ct Amethyst (Emerald, Violet, 11.62 x 8.61) vs. 1ct Diamond (Emerald, White, 6.68 x 4.95)
- 4ct Amethyst (Emerald, Violet, 11.62 x 8.61) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 4ct Amethyst (Emerald, Violet, 11.62 x 8.61) vs. 4ct Amethyst (Baguette, Violet, 12.62 x 8.41)
- 15ct Amethyst (Emerald, Violet, 18.06 x 13.38) vs. 20ct Citrine (Cushion, Yellow, 17.41 x 17.41)
- 40ct Amethyst (Emerald, Violet, 25.06 x 18.56) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 2ct Amethyst (Emerald, Violet, 9.23 x 6.84) vs. 2ct Diamond (Emerald, White, 8.42 x 6.24)
- 23ct Amethyst (Emerald, Light Purple, 20.08 x 16.15) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 9.5ct Amethyst (Emerald, Violet, 15.51 x 11.49) vs. 4ct Diamond (Cushion, White, 9.25 x 9.25)