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1.17ct Diamond (Round, 6.85×6.85mm, White) vs 0.65ct Sapphire (Round, 5.18×5.18mm, Blue)


Quick summary: When looked from above (face-up position), 1.17ct Diamond (6.85×6.85mm, round cut) appears 75% larger than 0.65ct Sapphire (5.18×5.18mm, round cut). See below how they compare side-by-side on a ring and finger.

1.17ct Diamond (round cut)
vs
 0.65ct Sapphire (round cut)
white
 
blue
6.85×6.85 mm 5.18×5.18 mm
actual size
Actual size of 1.17ct Diamond (round cut, 6.85×6.85mm, White color)   Actual size of 0.65ct Sapphire (round cut, 5.18×5.18mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 1.17ct Diamond (round cut, 6.85×6.85mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 0.65ct Sapphire (round cut, 5.18×5.18mm) 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
 41% vs 31%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1.17ct Diamond Round (6.85×6.85mm, White) and 0.65ct Sapphire Round (5.18×5.18mm, Blue) 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.


1.17 Ct Diamond (Round) 0.65 Ct Sapphire (Round)
6.85×6.85 mm vs 5.18×5.18 mm
36.85 mm²   21.07 mm²
Face-up size outline for 1.17ct Diamond (6.85×6.85mm, round cut)
Face-up size outline for 0.65ct Sapphire (5.18×5.18mm, round cut)
1.17ct Diamond Round (6.85×6.85mm)
0.65ct Sapphire Round (5.18×5.18mm)
Difference: 75% (15.78 mm²)
1.17ct Diamond (Round, 6.85×6.85mm) has approx. 75% more face-up area than 0.65ct Sapphire (Round, 5.18×5.18mm).


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