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1.5ct Topaz (Radiant, 6.57×6.57mm, Blue) vs 1.5ct Rhodolite (Radiant, 6.39×6.39mm, Purple)


Quick summary: When looked from above (face-up position), 1.5ct Topaz (6.57×6.57mm, radiant cut) appears 6% larger than 1.5ct Rhodolite (6.39×6.39mm, radiant cut). See below how they compare side-by-side on a ring and finger.

1.5ct Topaz (radiant cut)
vs
 1.5ct Rhodolite (radiant cut)
blue
 
purple
6.57×6.57 mm 6.39×6.39 mm
actual size
Actual size of 1.5ct Topaz (radiant cut, 6.57×6.57mm, Blue color)   Actual size of 1.5ct Rhodolite (radiant cut, 6.39×6.39mm, Purple color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 1.5ct Topaz (radiant cut, 6.57×6.57mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Purple 1.5ct Rhodolite (radiant cut, 6.39×6.39mm) 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
 39% vs 38%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.5ct Topaz Radiant (6.57×6.57mm, Blue) and 1.5ct Rhodolite Radiant (6.39×6.39mm, 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.


1.5 Ct Topaz (Radiant) 1.5 Ct Rhodolite (Radiant)
6.57×6.57 mm vs 6.39×6.39 mm
41.01 mm²   38.79 mm²
Face-up size outline for 1.5ct Topaz (6.57×6.57mm, radiant cut)
Face-up size outline for 1.5ct Rhodolite (6.39×6.39mm, radiant cut)
1.5ct Topaz Radiant (6.57×6.57mm)
1.5ct Rhodolite Radiant (6.39×6.39mm)
Difference: 6% (2.22 mm²)
1.5ct Topaz (Radiant, 6.57×6.57mm) has approx. 6% more face-up area than 1.5ct Rhodolite (Radiant, 6.39×6.39mm).


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