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11ct Sapphire (Oval, 16.82×11.21mm, Dark Blue) vs 0.65ct Diamond (Trillion, 6.2×6.2mm, White)


Quick summary: When looked from above (face-up position), 11ct Sapphire (16.82×11.21mm, oval cut) appears 6.5 times larger than 0.65ct Diamond (6.2×6.2mm, trillion cut). See below how they compare side-by-side on a ring and finger.

11ct Sapphire (oval cut)
vs
 0.65ct Diamond (trillion cut)
dark blue
 
white
16.82×11.21 mm 6.2×6.2 mm
actual size
Actual size of 11ct Sapphire (oval cut, 16.82×11.21mm, Dark Blue color)   Actual size of 0.65ct Diamond (trillion cut, 6.2×6.2mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Dark Blue 11ct Sapphire (oval cut, 16.82×11.21mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 0.65ct Diamond (trillion cut, 6.2×6.2mm) 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
 67% vs 37%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 11ct Sapphire Oval (16.82×11.21mm, Dark Blue) and 0.65ct Diamond Trillion (6.2×6.2mm, White) 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 Diamond for a given carat weight, because it has higher specific gravity (4 vs. 3.52 - this means it's "heavier" compared to Diamond 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.


11 Ct Sapphire (Oval) 0.65 Ct Diamond (Trillion)
16.82×11.21 mm vs 6.2×6.2 mm
154.61 mm²   23.83 mm²
Face-up size outline for 11ct Sapphire (16.82×11.21mm, oval cut)
Face-up size outline for 0.65ct Diamond (6.2×6.2mm, trillion cut)
11ct Sapphire Oval (16.82×11.21mm)
0.65ct Diamond Trillion (6.2×6.2mm)
Difference: 549% (130.78 mm²)
11ct Sapphire (Oval, 16.82×11.21mm) has approx. 549% more face-up area than 0.65ct Diamond (Trillion, 6.2×6.2mm). In other words, it's 6.49x larger.


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