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1.5ct Tourmaline (Round, 7.45×7.45mm, Light Red) vs 1.5ct Ruby (Oval, 8.66×5.77mm, Red)


Quick summary: When looked from above (face-up position), 1.5ct Tourmaline (7.45×7.45mm, round cut) appears 6% larger than 1.5ct Ruby (8.66×5.77mm, oval cut). See below how they compare side-by-side on a ring and finger.

1.5ct Tourmaline (round cut)
vs
 1.5ct Ruby (oval cut)
light red
 
red
7.45×7.45 mm 8.66×5.77 mm
actual size
Actual size of 1.5ct Tourmaline (round cut, 7.45×7.45mm, Light Red color)   Actual size of 1.5ct Ruby (oval cut, 8.66×5.77mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Red 1.5ct Tourmaline (round cut, 7.45×7.45mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 1.5ct Ruby (oval cut, 8.66×5.77mm) 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 35%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.5ct Tourmaline Round (7.45×7.45mm, Light Red) and 1.5ct Ruby Oval (8.66×5.77mm, 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 Tourmaline for a given carat weight, because it has higher specific gravity (4 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.


1.5 Ct Tourmaline (Round) 1.5 Ct Ruby (Oval)
7.45×7.45 mm vs 8.66×5.77 mm
43.59 mm²   40.97 mm²
Face-up size outline for 1.5ct Tourmaline (7.45×7.45mm, round cut)
Face-up size outline for 1.5ct Ruby (8.66×5.77mm, oval cut)
1.5ct Tourmaline Round (7.45×7.45mm)
1.5ct Ruby Oval (8.66×5.77mm)
Difference: 6% (2.62 mm²)
1.5ct Tourmaline (Round, 7.45×7.45mm) has approx. 6% more face-up area than 1.5ct Ruby (Oval, 8.66×5.77mm).


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