20ct Sunstone (Radiant, 17.15×17.15mm, Orangey Red) vs 20ct Diopside (Radiant, 15.95×15.95mm, Green)
Quick summary: When looked from above (face-up position), 20ct Sunstone (17.15×17.15mm, radiant cut) appears 16% larger than 20ct Diopside (15.95×15.95mm, radiant cut). See below how they compare side-by-side on a ring and finger.
| 20ct Sunstone (radiant cut) |
vs
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20ct Diopside (radiant cut) |
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orangey red |
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| 17.15×17.15 mm | 15.95×15.95 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
20ct Sunstone Radiant (17.15×17.15mm, Orangey Red)
and
20ct Diopside Radiant (15.95×15.95mm, 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.
| 20 Ct Sunstone (Radiant) | 20 Ct Diopside (Radiant) | |
| 17.15×17.15 mm | vs | 15.95×15.95 mm |
| 279.42 mm² | 241.68 mm² |
| 20ct Sunstone Radiant (17.15×17.15mm) | |
| 20ct Diopside Radiant (15.95×15.95mm) | |
| Difference: 16% (37.74 mm²) |
20ct Sunstone (Radiant, 17.15×17.15mm) has approx. 16% more face-up area than 20ct Diopside (Radiant, 15.95×15.95mm).
Popular comparisons:
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- 1ct Aquamarine (Oval, Light Blue, 8 x 6) vs. 1ct Spinel (Oval, Gray, 8 x 6)
- 1.16ct Diamond (Round, White, 6.82 x 6.85) vs. 1.2ct Diamond (Round, White, 6.82 x 6.86)
- 6ct Morganite (Cushion, Light Red, 12 x 10) vs. 3.5ct Sapphire (Cushion, Blue, 8.49 x 8.49)
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- 1ct Sapphire (Baguette, Blue, 6.93 x 4.62) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1ct Topaz (Round, Blue, 6 x 6) vs. 0.5ct Topaz (Round, Blue, 5 x 5)