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15ct Sunstone (Round, 16.91×16.91mm, Orangey Red) vs 15ct Diopside (Round, 15.72×15.72mm, Green)


Quick summary: When looked from above (face-up position), 15ct Sunstone (16.91×16.91mm, round cut) appears 16% larger than 15ct Diopside (15.72×15.72mm, round cut). See below how they compare side-by-side on a ring and finger.

15ct Sunstone (round cut)
vs
 15ct Diopside (round cut)
orangey red
 
green
16.91×16.91 mm 15.72×15.72 mm
actual size
Actual size of 15ct Sunstone (round cut, 16.91×16.91mm, Orangey Red color)   Actual size of 15ct Diopside (round cut, 15.72×15.72mm, Green color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Orangey Red 15ct Sunstone (round cut, 16.91×16.91mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Green 15ct Diopside (round cut, 15.72×15.72mm) on a right ring and finger
Your settings
Ring
 Gold
Skin tone
 Light
Ring diameter
 16.9 mm
Ring width
 3.0 mm
Finger length
 64 mm
Finger coverage
 101% vs 94%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 15ct Sunstone Round (16.91×16.91mm, Orangey Red) and 15ct Diopside Round (15.72×15.72mm, 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.


15 Ct Sunstone (Round) 15 Ct Diopside (Round)
16.91×16.91 mm vs 15.72×15.72 mm
224.58 mm²   194.09 mm²
Face-up size outline for 15ct Sunstone (16.91×16.91mm, round cut)
Face-up size outline for 15ct Diopside (15.72×15.72mm, round cut)
15ct Sunstone Round (16.91×16.91mm)
15ct Diopside Round (15.72×15.72mm)
Difference: 16% (30.49 mm²)
15ct Sunstone (Round, 16.91×16.91mm) has approx. 16% more face-up area than 15ct Diopside (Round, 15.72×15.72mm).


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