30ct Sunstone (Princess, 18.72×18.72mm, Orangey Red) vs 30ct Diopside (Princess, 17.4×17.4mm, Green)
Quick summary: When looked from above (face-up position), 30ct Sunstone (18.72×18.72mm, princess cut) appears 16% larger than 30ct Diopside (17.4×17.4mm, princess cut). See below how they compare side-by-side on a ring and finger.
| 30ct Sunstone (princess cut) |
vs
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30ct Diopside (princess cut) |
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orangey red |
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| 18.72×18.72 mm | 17.4×17.4 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 Sunstone Princess (18.72×18.72mm, Orangey Red)
and
30ct Diopside Princess (17.4×17.4mm, 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.
| 30 Ct Sunstone (Princess) | 30 Ct Diopside (Princess) | |
| 18.72×18.72 mm | vs | 17.4×17.4 mm |
| 350.44 mm² | 302.76 mm² |
| 30ct Sunstone Princess (18.72×18.72mm) | |
| 30ct Diopside Princess (17.4×17.4mm) | |
| Difference: 16% (47.68 mm²) |
30ct Sunstone (Princess, 18.72×18.72mm) has approx. 16% more face-up area than 30ct Diopside (Princess, 17.4×17.4mm).
Popular comparisons:
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