carat vs. color  length*  width*

(or examine a single gem)
* size in mm (optional)

2 Ct Andesine (Cushion)


1.8 Ct Sapphire (Emerald)

orangey red
8.06×8.06 mm 7.76×5.75 mm
actual size
Actual size of 2ct Andesine   Actual size of 1.8ct Sapphire
Actual size is set for screen Change
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Orangey Red 2ct Andesine on a ring
64 mm
Right finger image
Ring on a right finger
Blue 1.8ct Sapphire on a ring
Your settings
Skin tone
Ring diameter
16.9 mm
Ring width
3.0 mm
Finger length
64 mm
Ring diameter: 16.9 mm
Actual sizes of 2ct Andesine Cushion (8.06×8.06mm, Orangey Red) and 1.8ct Sapphire Emerald (7.76×5.75mm, 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?

JamesAllen → high-quality blue 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 Andesine for a given carat weight, because it has higher specific gravity (4 vs. 2.67 - this means it's "heavier" compared to Andesine 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.

2 Ct Andesine (Cushion) 1.8 Ct Sapphire (Emerald)
8.06×8.06 mm vs 7.76×5.75 mm
58.47 mm²   41.5 mm²
Face-up size outline
Face-up size outline
2ct Andesine Cushion (8.06×8.06mm)
1.8ct Sapphire Emerald (7.76×5.75mm)
Difference: 41% (16.97 mm²)
2ct Andesine Cushion (8.06×8.06mm) has approx. 41% more face-up area than 1.8ct Sapphire Emerald (7.76×5.75mm).

Popular comparisons:

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Actual size is currently adjusted to screen.

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.