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3.9ct Tourmaline (Cushion, 9.58×9.58mm, Light Yellow) vs 4.2ct Sapphire (Cushion, 9.02×9.02mm, Yellow)


Quick summary: When looked from above (face-up position), 3.9ct Tourmaline (9.58×9.58mm, cushion cut) appears 13% larger than 4.2ct Sapphire (9.02×9.02mm, cushion cut). See below how they compare side-by-side on a ring and finger.

3.9ct Tourmaline (cushion cut)
vs
 4.2ct Sapphire (cushion cut)
light yellow
 
yellow
9.58×9.58 mm 9.02×9.02 mm
actual size
Actual size of 3.9ct Tourmaline (cushion cut, 9.58×9.58mm, Light Yellow color)   Actual size of 4.2ct Sapphire (cushion cut, 9.02×9.02mm, Yellow color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Yellow 3.9ct Tourmaline (cushion cut, 9.58×9.58mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Yellow 4.2ct Sapphire (cushion cut, 9.02×9.02mm) 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
 57% vs 54%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 3.9ct Tourmaline Cushion (9.58×9.58mm, Light Yellow) and 4.2ct Sapphire Cushion (9.02×9.02mm, Yellow) 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, Sapphire 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.


3.9 Ct Tourmaline (Cushion) 4.2 Ct Sapphire (Cushion)
9.58×9.58 mm vs 9.02×9.02 mm
82.6 mm²   73.22 mm²
Face-up size outline for 3.9ct Tourmaline (9.58×9.58mm, cushion cut)
Face-up size outline for 4.2ct Sapphire (9.02×9.02mm, cushion cut)
3.9ct Tourmaline Cushion (9.58×9.58mm)
4.2ct Sapphire Cushion (9.02×9.02mm)
Difference: 13% (9.38 mm²)
3.9ct Tourmaline (Cushion, 9.58×9.58mm) has approx. 13% more face-up area than 4.2ct Sapphire (Cushion, 9.02×9.02mm).


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