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1.77ct Sapphire (Oval, 9.15×6.1mm, Dark Blue) vs 6.53ct Topaz (Oval, 14.75×9.83mm, Bluish Green)


Quick summary: When looked from above (face-up position), 6.53ct Topaz (14.75×9.83mm, oval cut) appears 2.6 times larger than 1.77ct Sapphire (9.15×6.1mm, oval cut). See below how they compare side-by-side on a ring and finger.

1.77ct Sapphire (oval cut)
vs
 6.53ct Topaz (oval cut)
dark blue
 
bluish green
9.15×6.1 mm 14.75×9.83 mm
actual size
Actual size of 1.77ct Sapphire (oval cut, 9.15×6.1mm, Dark Blue color)   Actual size of 6.53ct Topaz (oval cut, 14.75×9.83mm, Bluish Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Dark Blue 1.77ct Sapphire (oval cut, 9.15×6.1mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Bluish Green 6.53ct Topaz (oval cut, 14.75×9.83mm) 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
 37% vs 59%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.77ct Sapphire Oval (9.15×6.1mm, Dark Blue) and 6.53ct Topaz Oval (14.75×9.83mm, Bluish Green) 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 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.


1.77 Ct Sapphire (Oval) 6.53 Ct Topaz (Oval)
9.15×6.1 mm vs 14.75×9.83 mm
45.77 mm²   118.89 mm²
Face-up size outline for 6.53ct Topaz (14.75×9.83mm, oval cut)
Face-up size outline for 1.77ct Sapphire (9.15×6.1mm, oval cut)
1.77ct Sapphire Oval (9.15×6.1mm)
6.53ct Topaz Oval (14.75×9.83mm)
Difference: 160% (73.12 mm²)
6.53ct Topaz (Oval, 14.75×9.83mm) has approx. 160% more face-up area than 1.77ct Sapphire (Oval, 9.15×6.1mm). In other words, it's 2.6x larger.


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