18ct Sunstone (Oval, 23.06×15.37mm, Orangey Red) vs 18ct Diopside (Oval, 21.42×14.28mm, Green)
Quick summary: When looked from above (face-up position), 18ct Sunstone (23.06×15.37mm, oval cut) appears 16% larger than 18ct Diopside (21.42×14.28mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 18ct Sunstone (oval cut) |
vs
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18ct Diopside (oval cut) |
|
orangey red |
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| 23.06×15.37 mm | 21.42×14.28 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 Sunstone Oval (23.06×15.37mm, Orangey Red)
and
18ct Diopside Oval (21.42×14.28mm, 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, Diopside will face-up smaller than Sunstone for a given
carat weight, because it has higher specific gravity
(3.3 vs. 2.65 - this means it's "heavier" compared to Sunstone 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 Sunstone (Oval) | 18 Ct Diopside (Oval) | |
| 23.06×15.37 mm | vs | 21.42×14.28 mm |
| 290.63 mm² | 250.82 mm² |
| 18ct Sunstone Oval (23.06×15.37mm) | |
| 18ct Diopside Oval (21.42×14.28mm) | |
| Difference: 16% (39.81 mm²) |
18ct Sunstone (Oval, 23.06×15.37mm) has approx. 16% more face-up area than 18ct Diopside (Oval, 21.42×14.28mm).
Popular comparisons:
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- 1ct Topaz (Round, Blue, 6 x 6) vs. 0.5ct Topaz (Round, Blue, 5 x 5)