×
carat vs. color  length*  width*
  ×

(or examine a )
* size in mm (optional)

3ct Topaz (Pear, 12.48×7.52mm, Blue) vs 3ct Ruby (Pear, 11.99×7.22mm, Red)


Quick summary: When looked from above (face-up position), 3ct Topaz (12.48×7.52mm, pear cut) appears 8% larger than 3ct Ruby (11.99×7.22mm, pear cut). See below how they compare side-by-side on a ring and finger.

3ct Topaz (pear cut)
vs
 3ct Ruby (pear cut)
blue
 
red
12.48×7.52 mm 11.99×7.22 mm
actual size
Actual size of 3ct Topaz (pear cut, 12.48×7.52mm, Blue color)   Actual size of 3ct Ruby (pear cut, 11.99×7.22mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 3ct Topaz (pear cut, 12.48×7.52mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 3ct Ruby (pear cut, 11.99×7.22mm) 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
 45% vs 43%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 3ct Topaz Pear (12.48×7.52mm, Blue) and 3ct Ruby Pear (11.99×7.22mm, 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.


3 Ct Topaz (Pear) 3 Ct Ruby (Pear)
12.48×7.52 mm vs 11.99×7.22 mm
68.51 mm²   63.19 mm²
Face-up size outline for 3ct Topaz (12.48×7.52mm, pear cut)
Face-up size outline for 3ct Ruby (11.99×7.22mm, pear cut)
3ct Topaz Pear (12.48×7.52mm)
3ct Ruby Pear (11.99×7.22mm)
Difference: 8% (5.32 mm²)
3ct Topaz (Pear, 12.48×7.52mm) has approx. 8% more face-up area than 3ct Ruby (Pear, 11.99×7.22mm).


Popular comparisons: