30ct Amethyst (Pear, 29.6×17.83mm, Violet) vs 30ct Topaz (Pear, 26.91×16.21mm, Blue)
Quick summary: When looked from above (face-up position), 30ct Amethyst (29.6×17.83mm, pear cut) appears 21% larger than 30ct Topaz (26.91×16.21mm, pear cut). See below how they compare side-by-side on a ring and finger.
| 30ct Amethyst (pear cut) |
vs
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30ct Topaz (pear cut) |
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violet |
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| 29.6×17.83 mm | 26.91×16.21 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
30ct Amethyst Pear (29.6×17.83mm, Violet)
and
30ct Topaz Pear (26.91×16.21mm, 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, Topaz will face-up smaller than Amethyst for a given
carat weight, because it has higher specific gravity
(3.53 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.
| 30 Ct Amethyst (Pear) | 30 Ct Topaz (Pear) | |
| 29.6×17.83 mm | vs | 26.91×16.21 mm |
| 385.27 mm² | 318.43 mm² |
| 30ct Amethyst Pear (29.6×17.83mm) | |
| 30ct Topaz Pear (26.91×16.21mm) | |
| Difference: 21% (66.84 mm²) |
30ct Amethyst (Pear, 29.6×17.83mm) has approx. 21% more face-up area than 30ct Topaz (Pear, 26.91×16.21mm).
Popular comparisons:
- 30ct Amethyst (Pear, Violet, 29.6 x 17.83) vs. 1.5ct Amethyst (Emerald, Violet, 8 x 6)
- 30ct Amethyst (Pear, Violet, 29.6 x 17.83) vs. 5ct Amethyst (Oval, Violet, 14.84 x 9.89)
- 30ct Amethyst (Pear, Violet, 29.6 x 17.83) vs. 30ct Emerald (Pear, Green, 29.42 x 17.72)
- 30ct Amethyst (Pear, Violet, 29.6 x 17.83) vs. 20ct Emerald (Pear, Green, 25.7 x 15.48)
- 30ct Amethyst (Pear, Violet, 29.6 x 17.83) vs. 4ct Amethyst (Pear, Violet, 15.12 x 9.11)
- 0.65ct Amethyst (Pear, Violet, 8 x 6) vs. 1.5ct Amethyst (Emerald, Violet, 8 x 6)
- 1ct Amethyst (Pear, Violet, 9.53 x 5.74) vs. 1ct Diamond (Pear, White, 9.05 x 5.45)
- 1.4ct Amethyst (Pear, Light Purple, 10 x 7) vs. 1.5ct Diamond (Pear, White, 10 x 6.8)