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3ct Benitoite (Oval, 11.25×7.5mm, Blue) vs 1.5ct Diamond (Oval, 9.29×6.19mm, White)


Quick summary: When looked from above (face-up position), 3ct Benitoite (11.25×7.5mm, oval cut) appears 47% larger than 1.5ct Diamond (9.29×6.19mm, oval cut). See below how they compare side-by-side on a ring and finger.

3ct Benitoite (oval cut)
vs
 1.5ct Diamond (oval cut)
blue
 
white
11.25×7.5 mm 9.29×6.19 mm
actual size
Actual size of 3ct Benitoite (oval cut, 11.25×7.5mm, Blue color)   Actual size of 1.5ct Diamond (oval cut, 9.29×6.19mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 3ct Benitoite (oval cut, 11.25×7.5mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 1.5ct Diamond (oval cut, 9.29×6.19mm) 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 37%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 3ct Benitoite Oval (11.25×7.5mm, Blue) and 1.5ct Diamond Oval (9.29×6.19mm, 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, Benitoite will face-up smaller than Diamond for a given carat weight, because it has higher specific gravity (3.65 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.


3 Ct Benitoite (Oval) 1.5 Ct Diamond (Oval)
11.25×7.5 mm vs 9.29×6.19 mm
69.19 mm²   47.15 mm²
Face-up size outline for 3ct Benitoite (11.25×7.5mm, oval cut)
Face-up size outline for 1.5ct Diamond (9.29×6.19mm, oval cut)
3ct Benitoite Oval (11.25×7.5mm)
1.5ct Diamond Oval (9.29×6.19mm)
Difference: 47% (22.04 mm²)
3ct Benitoite (Oval, 11.25×7.5mm) has approx. 47% more face-up area than 1.5ct Diamond (Oval, 9.29×6.19mm).


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