18ct Apatite (Cushion, 15.63×15.63mm, Green) vs 18ct Peridot (Cushion, 15.41×15.41mm, Yellowish Green)
Quick summary: When looked from above (face-up position), 18ct Apatite (15.63×15.63mm, cushion cut) appears 3% larger than 18ct Peridot (15.41×15.41mm, cushion cut). See below how they compare side-by-side on a ring and finger.
| 18ct Apatite (cushion cut) |
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18ct Peridot (cushion cut) |
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green |
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| 15.63×15.63 mm | 15.41×15.41 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
18ct Apatite Cushion (15.63×15.63mm, Green)
and
18ct Peridot Cushion (15.41×15.41mm, Yellowish Green)
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, Peridot will face-up smaller than Apatite for a given
carat weight, because it has higher specific gravity
(3.34 vs. 3.2 - this means it's "heavier" compared to Apatite 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.
| 18 Ct Apatite (Cushion) | 18 Ct Peridot (Cushion) | |
| 15.63×15.63 mm | vs | 15.41×15.41 mm |
| 219.87 mm² | 213.72 mm² |
| 18ct Apatite Cushion (15.63×15.63mm) | |
| 18ct Peridot Cushion (15.41×15.41mm) | |
| Difference: 3% (6.15 mm²) |
18ct Apatite (Cushion, 15.63×15.63mm) has approx. 3% more face-up area than 18ct Peridot (Cushion, 15.41×15.41mm).
Popular comparisons:
- 5ct Apatite (Cushion, Bluish Green, 10 x 12.4) vs. 5ct Topaz (Round, Light Blue, 12 x 12)
- 4.6ct Apatite (Cushion, Green, 10.02 x 10.02) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1ct Apatite (Cushion, Light Blue, 6.02 x 6.02) vs. 1ct Topaz (Oval, Light Blue, 7.89 x 5.26)
- 5ct Apatite (Cushion, Bluish Green, 12 x 10) vs. 5ct Topaz (Round, Light Blue, 12 x 12)
- 1ct Apatite (Cushion, Bluish Green, 6.02 x 6.02) vs. 1ct Topaz (Cushion, Light Bluish Green, 5.83 x 5.83)
- 1ct Apatite (Cushion, Purple, 7.69 x 5.68) vs. 1ct Apatite (Pear, Dark Green, 9 x 6)
- 1ct Apatite (Cushion, Purple, 7.69 x 5.68) vs. 1ct Apatite (Pear, Dark Green, 9.4 x 5.2)
- 1.5ct Apatite (Cushion, Green, 6.9 x 6.9) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 2ct Apatite (Cushion, Light Gray, 7.59 x 7.59) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)