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0.25ct Topaz (Round, 3.93×3.93mm, Blue) vs 0.25ct Rhodolite (Round, 3.82×3.82mm, Purple)


Quick summary: When looked from above (face-up position), 0.25ct Topaz (3.93×3.93mm, round cut) appears 6% larger than 0.25ct Rhodolite (3.82×3.82mm, round cut). See below how they compare side-by-side on a ring and finger.

0.25ct Topaz (round cut)
vs
 0.25ct Rhodolite (round cut)
blue
 
purple
3.93×3.93 mm 3.82×3.82 mm
actual size
Actual size of 0.25ct Topaz (round cut, 3.93×3.93mm, Blue color)   Actual size of 0.25ct Rhodolite (round cut, 3.82×3.82mm, Purple color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 0.25ct Topaz (round cut, 3.93×3.93mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Purple 0.25ct Rhodolite (round cut, 3.82×3.82mm) 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
 24% vs 23%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 0.25ct Topaz Round (3.93×3.93mm, Blue) and 0.25ct Rhodolite Round (3.82×3.82mm, Purple) 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, Rhodolite will face-up smaller than Topaz for a given carat weight, because it has higher specific gravity (3.84 vs. 3.53 - this means it's "heavier" compared to Topaz 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.


0.25 Ct Topaz (Round) 0.25 Ct Rhodolite (Round)
3.93×3.93 mm vs 3.82×3.82 mm
12.13 mm²   11.46 mm²
Face-up size outline for 0.25ct Topaz (3.93×3.93mm, round cut)
Face-up size outline for 0.25ct Rhodolite (3.82×3.82mm, round cut)
0.25ct Topaz Round (3.93×3.93mm)
0.25ct Rhodolite Round (3.82×3.82mm)
Difference: 6% (0.67 mm²)
0.25ct Topaz (Round, 3.93×3.93mm) has approx. 6% more face-up area than 0.25ct Rhodolite (Round, 3.82×3.82mm).


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