×
carat vs. color  length*  width*
  ×

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

0.2ct Amethyst (Round, 4.01×4.01mm, Violet) vs 0.2ct Sapphire (Emerald, 3.74×2.77mm, Blue)


Quick summary: When looked from above (face-up position), 0.2ct Amethyst (4.01×4.01mm, round cut) appears 31% larger than 0.2ct Sapphire (3.74×2.77mm, emerald cut). See below how they compare side-by-side on a ring and finger.

0.2ct Amethyst (round cut)
vs
0.2ct Sapphire (emerald cut)
violet
 
blue
4.01×4.01 mm 3.74×2.77 mm
actual size
Actual size of 0.2ct Amethyst (round cut, 4.01×4.01mm, Violet color)   Actual size of 0.2ct Sapphire (emerald cut, 3.74×2.77mm, Blue color)
 
Actual size is set for screen Change
Settings
Ring: Skin tone:
Ring width: 3.0 mm
Saved...
Left finger image
Ring on left finger
Violet 0.2ct Amethyst (round cut, 4.01×4.01mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 0.2ct Sapphire (emerald cut, 3.74×2.77mm) 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
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 0.2ct Amethyst Round (4.01×4.01mm, Violet) and 0.2ct Sapphire Emerald (3.74×2.77mm, 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 Amethyst for a given carat weight, because it has higher specific gravity (4 vs. 2.65 - this means it's "heavier" compared to Amethyst 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.


0.2 Ct Amethyst (Round) 0.2 Ct Sapphire (Emerald)
4.01×4.01 mm vs 3.74×2.77 mm
12.63 mm²   9.63 mm²
Face-up size outline for 0.2ct Amethyst (4.01×4.01mm, round cut)
Face-up size outline for 0.2ct Sapphire (3.74×2.77mm, emerald cut)
0.2ct Amethyst Round (4.01×4.01mm)
0.2ct Sapphire Emerald (3.74×2.77mm)
Difference: 31% (3 mm²)
0.2ct Amethyst Round (4.01×4.01mm) has approx. 31% more face-up area than 0.2ct Sapphire Emerald (3.74×2.77mm).


Popular comparisons:

Enter your screen size (diagonal)

My screen size is  inches



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.