×
carat vs. color  length*  width*
  ×

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

1.9ct Tanzanite (Emerald, 8.44×6.25mm, Light Blue) vs 1.6ct Amethyst (Princess, 7.21×7.21mm, Violet)


Quick summary: When looked from above (face-up position), 1.6ct Amethyst (7.21×7.21mm, princess cut) appears 6% larger than 1.9ct Tanzanite (8.44×6.25mm, emerald cut). See below how they compare side-by-side on a ring and finger.

1.9ct Tanzanite (emerald cut)
vs
1.6ct Amethyst (princess cut)
light blue
 
violet
8.44×6.25 mm 7.21×7.21 mm
actual size
Actual size of 1.9ct Tanzanite (emerald cut, 8.44×6.25mm, Light Blue color)   Actual size of 1.6ct Amethyst (princess cut, 7.21×7.21mm, Violet 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
Light Blue 1.9ct Tanzanite (emerald cut, 8.44×6.25mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Violet 1.6ct Amethyst (princess cut, 7.21×7.21mm) 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 1.9ct Tanzanite Emerald (8.44×6.25mm, Light Blue) and 1.6ct Amethyst Princess (7.21×7.21mm, 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?

For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile

Face-up Size

All things being equal, Tanzanite will face-up smaller than Amethyst for a given carat weight, because it has higher specific gravity (3.3 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.


1.9 Ct Tanzanite (Emerald) 1.6 Ct Amethyst (Princess)
8.44×6.25 mm vs 7.21×7.21 mm
49.06 mm²   51.98 mm²
Face-up size outline for 1.6ct Amethyst (7.21×7.21mm, princess cut)
Face-up size outline for 1.9ct Tanzanite (8.44×6.25mm, emerald cut)
1.9ct Tanzanite Emerald (8.44×6.25mm)
1.6ct Amethyst Princess (7.21×7.21mm)
Difference: 6% (2.92 mm²)
1.6ct Amethyst Princess (7.21×7.21mm) has approx. 6% more face-up area than 1.9ct Tanzanite Emerald (8.44×6.25mm).


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.