1ct Amethyst (Round, 6.86×6.86mm, Purple) vs 1ct Quartz (Oval, 8.67×5.78mm, Light Red)
Quick summary: When looked from above (face-up position), 1ct Quartz (8.67×5.78mm, oval cut) appears 11% larger than 1ct Amethyst (6.86×6.86mm, round cut). See below how they compare side-by-side on a ring and finger.
| 1ct Amethyst (round cut) |
vs
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1ct Quartz (oval cut) |
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purple |
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| 6.86×6.86 mm | 8.67×5.78 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 Amethyst Round (6.86×6.86mm, Purple)
and
1ct Quartz Oval (8.67×5.78mm, Light Red)
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
Amethyst and Quartz have the same specific gravity so their face-up size
depends on the weight, shape and 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.
| 1 Ct Amethyst (Round) | 1 Ct Quartz (Oval) | |
| 6.86×6.86 mm | vs | 8.67×5.78 mm |
| 36.96 mm² | 41.09 mm² |
| 1ct Amethyst Round (6.86×6.86mm) | |
| 1ct Quartz Oval (8.67×5.78mm) | |
| Difference: 11% (4.13 mm²) |
1ct Quartz (Oval, 8.67×5.78mm) has approx. 11% more face-up area than 1ct Amethyst (Round, 6.86×6.86mm).
Popular comparisons:
- 1ct Amethyst (Round, Purple, 6.86 x 6.86) vs. 1ct Emerald (Emerald, Bluish Green, 7.28 x 5.39)
- 1ct Amethyst (Round, Purple, 6.86 x 6.86) vs. 1ct Amethyst (Emerald, Dark Violet, 7.33 x 5.43)
- 1ct Amethyst (Round, Purple, 6.86 x 6.86) vs. 1ct Quartz (Round, Yellowish Green, 6.86 x 6.86)
- 1ct Amethyst (Round, Purple, 6.86 x 6.86) vs. 1ct Peridot (Round, Light Yellowish Green, 6.34 x 6.34)
- 1ct Amethyst (Round, Violet, 6.86 x 6.86) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 1ct Amethyst (Round, Violet, 6.86 x 6.86) vs. 1ct Tanzanite (Emerald, Blue, 6.8 x 5.04)
- 2ct Amethyst (Round, Violet, 8.64 x 8.64) vs. 2ct Amethyst (Oval, Violet, 10.94 x 7.29)
- 1ct Amethyst (Round, Violet, 6.86 x 6.86) vs. 1ct Tanzanite (Round, Blue, 6.37 x 6.37)