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0.21ct Diopside (Oval, 4.8×3.2mm, Green) vs 6.35ct Topaz (Round, 11.1×11.1mm, Orangey Red)


Quick summary: When looked from above (face-up position), 6.35ct Topaz (11.1×11.1mm, round cut) appears 7.7 times larger than 0.21ct Diopside (4.8×3.2mm, oval cut). See below how they compare side-by-side on a ring and finger.

0.21ct Diopside (oval cut)
vs
 6.35ct Topaz (round cut)
green
 
orangey red
4.8×3.2 mm 11.1×11.1 mm
actual size
Actual size of 0.21ct Diopside (oval cut, 4.8×3.2mm, Green color)   Actual size of 6.35ct Topaz (round cut, 11.1×11.1mm, Orangey Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 0.21ct Diopside (oval cut, 4.8×3.2mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Orangey Red 6.35ct Topaz (round cut, 11.1×11.1mm) 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
 19% vs 66%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.21ct Diopside Oval (4.8×3.2mm, Green) and 6.35ct Topaz Round (11.1×11.1mm, Orangey Red) 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, Topaz will face-up smaller than Diopside for a given carat weight, because it has higher specific gravity (3.53 vs. 3.3 - this means it's "heavier" compared to Diopside 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.


0.21 Ct Diopside (Oval) 6.35 Ct Topaz (Round)
4.8×3.2 mm vs 11.1×11.1 mm
12.6 mm²   96.77 mm²
Face-up size outline for 6.35ct Topaz (11.1×11.1mm, round cut)
Face-up size outline for 0.21ct Diopside (4.8×3.2mm, oval cut)
0.21ct Diopside Oval (4.8×3.2mm)
6.35ct Topaz Round (11.1×11.1mm)
Difference: 668% (84.17 mm²)
6.35ct Topaz (Round, 11.1×11.1mm) has approx. 668% more face-up area than 0.21ct Diopside (Oval, 4.8×3.2mm). In other words, it's 7.68x larger.


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