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carat vs. color  length*  width*
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0.4 Ct Benitoite (Round)

vs

0.4 Ct Sapphire (Round)

blue
 
violet
4.54×4.54 mm 4.4×4.4 mm
actual size
Actual size of 0.4ct Benitoite   Actual size of 0.4ct Sapphire
 
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Ring: Skin tone:
Ring width: 3.0 mm
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Left finger image
Ring on left finger
Blue 0.4ct Benitoite on a ring
64 mm
Right finger image
Ring on a right finger
Violet 0.4ct Sapphire on a ring
Your settings
Ring
Gold
Skin tone
Light
Ring diameter
16.9 mm
Ring width
3.0 mm
Finger length
64 mm
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Ring diameter: 16.9 mm
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Actual sizes of 0.4ct Benitoite Round (4.54×4.54mm, Blue) and 0.4ct Sapphire Round (4.4×4.4mm, Violet) 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?

JamesAllen → high-quality pink Sapphires, high-end jewelry and competitive prices. Highly recommended.
Amazon → usually offers a good selection from many different vendors. Worth a check.

Face-up Size

All things being equal, Sapphire will face-up smaller than Benitoite for a given carat weight, because it has higher specific gravity (4 vs. 3.65 - this means it's "heavier" compared to Benitoite 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.


0.4 Ct Benitoite (Round) 0.4 Ct Sapphire (Round)
4.54×4.54 mm vs 4.4×4.4 mm
16.19 mm²   15.21 mm²
Face-up size outline
Face-up size outline
0.4ct Benitoite Round (4.54×4.54mm)
0.4ct Sapphire Round (4.4×4.4mm)
Difference: 6% (0.98 mm²)
0.4ct Benitoite Round (4.54×4.54mm) has approx. 6% more face-up area than 0.4ct Sapphire Round (4.4×4.4mm).


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If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.