0.28ct Sapphire (Round, 3.91×3.91mm, Blue) vs 5ct Amethyst (Oval, 14.84×9.89mm, Violet)
Quick summary: When looked from above (face-up position), 5ct Amethyst (14.84×9.89mm, oval cut) appears 10 times larger than 0.28ct Sapphire (3.91×3.91mm, round cut). See below how they compare side-by-side on a ring and finger.
| 0.28ct Sapphire (round cut) |
vs
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5ct Amethyst (oval cut) |
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blue |
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| 3.91×3.91 mm | 14.84×9.89 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
0.28ct Sapphire Round (3.91×3.91mm, Blue)
and
5ct Amethyst Oval (14.84×9.89mm, Violet)
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, Sapphire will face-up smaller than Amethyst for a given
carat weight, because it has higher specific gravity
(4 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.
| 0.28 Ct Sapphire (Round) | 5 Ct Amethyst (Oval) | |
| 3.91×3.91 mm | vs | 14.84×9.89 mm |
| 12.01 mm² | 120.35 mm² |
| 0.28ct Sapphire Round (3.91×3.91mm) | |
| 5ct Amethyst Oval (14.84×9.89mm) | |
| Difference: 902% (108.34 mm²) |
5ct Amethyst (Oval, 14.84×9.89mm) has approx. 902% more face-up area than 0.28ct Sapphire (Round, 3.91×3.91mm). In other words, it's 10.02x larger.
Popular comparisons:
- 0.28ct Sapphire (Round, Blue, 3.91 x 3.91) vs. 0.05ct Diamond (Round, White, 2.39 x 2.39)
- 0.28ct Sapphire (Round, Blue, 3.91 x 3.91) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.28ct Sapphire (Round, Blue, 3.91 x 3.91) vs. 0.05ct Sapphire (Round, Blue, 2.2 x 2.2)
- 0.28ct Sapphire (Round, Blue, 3.91 x 3.91) vs. 0.24ct Citrine (Round, Light Orange, 4.26 x 4.26)
- 0.28ct Sapphire (Round, Blue, 3.91 x 3.91) vs. 0.43ct Diamond (Round, White, 4.91 x 4.91)
- 0.28ct Sapphire (Round, Blue, 3.91 x 3.91) vs. 0.3ct Diamond (Round, White, 4.35 x 4.35)
- 0.28ct Sapphire (Round, Blue, 3.91 x 3.91) vs. 0.07ct Diamond (Round, White, 2.68 x 2.68)
- 0.28ct Sapphire (Round, Blue, 3.91 x 3.91) vs. 0.15ct Diamond (Round, White, 3.45 x 3.45)