×
carat vs. color  length*  width*
  ×

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

15ct Topaz (Baguette, 17.82×11.88mm, Blue) vs 15ct Tourmaline (Baguette, 18.6×12.4mm, Violet)


Quick summary: When looked from above (face-up position), 15ct Tourmaline (18.6×12.4mm, baguette cut) appears 9% larger than 15ct Topaz (17.82×11.88mm, baguette cut). See below how they compare side-by-side on a ring and finger.

15ct Topaz (baguette cut)
vs
 15ct Tourmaline (baguette cut)
blue
 
violet
17.82×11.88 mm 18.6×12.4 mm
actual size
Actual size of 15ct Topaz (baguette cut, 17.82×11.88mm, Blue color)   Actual size of 15ct Tourmaline (baguette cut, 18.6×12.4mm, Violet color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 15ct Topaz (baguette cut, 17.82×11.88mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Violet 15ct Tourmaline (baguette cut, 18.6×12.4mm) 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
 71% vs 74%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 15ct Topaz Baguette (17.82×11.88mm, Blue) and 15ct Tourmaline Baguette (18.6×12.4mm, Violet) 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 Tourmaline for a given carat weight, because it has higher specific gravity (3.53 vs. 3.06 - this means it's "heavier" compared to Tourmaline 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.


15 Ct Topaz (Baguette) 15 Ct Tourmaline (Baguette)
17.82×11.88 mm vs 18.6×12.4 mm
211.7 mm²   230.64 mm²
Face-up size outline for 15ct Tourmaline (18.6×12.4mm, baguette cut)
Face-up size outline for 15ct Topaz (17.82×11.88mm, baguette cut)
15ct Topaz Baguette (17.82×11.88mm)
15ct Tourmaline Baguette (18.6×12.4mm)
Difference: 9% (18.94 mm²)
15ct Tourmaline (Baguette, 18.6×12.4mm) has approx. 9% more face-up area than 15ct Topaz (Baguette, 17.82×11.88mm).


Popular comparisons: