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1.25ct Ruby (Emerald, 6.89×5.1mm, Red) vs 1.25ct Topaz (Emerald, 7.17×5.31mm, Red)


Quick summary: When looked from above (face-up position), 1.25ct Topaz (7.17×5.31mm, emerald cut) appears 8% larger than 1.25ct Ruby (6.89×5.1mm, emerald cut). See below how they compare side-by-side on a ring and finger.

1.25ct Ruby (emerald cut)
vs
 1.25ct Topaz (emerald cut)
red
 
red
6.89×5.1 mm 7.17×5.31 mm
actual size
Actual size of 1.25ct Ruby (emerald cut, 6.89×5.1mm, Red color)   Actual size of 1.25ct Topaz (emerald cut, 7.17×5.31mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 1.25ct Ruby (emerald cut, 6.89×5.1mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 1.25ct Topaz (emerald cut, 7.17×5.31mm) 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
 31% vs 32%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.25ct Ruby Emerald (6.89×5.1mm, Red) and 1.25ct Topaz Emerald (7.17×5.31mm, 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, Ruby will face-up smaller than Topaz for a given carat weight, because it has higher specific gravity (4 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.


1.25 Ct Ruby (Emerald) 1.25 Ct Topaz (Emerald)
6.89×5.1 mm vs 7.17×5.31 mm
32.68 mm²   35.41 mm²
Face-up size outline for 1.25ct Topaz (7.17×5.31mm, emerald cut)
Face-up size outline for 1.25ct Ruby (6.89×5.1mm, emerald cut)
1.25ct Ruby Emerald (6.89×5.1mm)
1.25ct Topaz Emerald (7.17×5.31mm)
Difference: 8% (2.73 mm²)
1.25ct Topaz (Emerald, 7.17×5.31mm) has approx. 8% more face-up area than 1.25ct Ruby (Emerald, 6.89×5.1mm).


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