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1.9ct Tanzanite (Emerald, 8.44×6.25mm, Light Blue) vs 0.15ct Diamond (Round, 3.45×3.45mm, White)


Quick summary: When looked from above (face-up position), 1.9ct Tanzanite (8.44×6.25mm, emerald cut) appears 5.3 times larger than 0.15ct Diamond (3.45×3.45mm, round cut). See below how they compare side-by-side on a ring and finger.

1.9ct Tanzanite (emerald cut)
vs
 0.15ct Diamond (round cut)
light blue
 
white
8.44×6.25 mm 3.45×3.45 mm
actual size
Actual size of 1.9ct Tanzanite (emerald cut, 8.44×6.25mm, Light Blue color)   Actual size of 0.15ct Diamond (round cut, 3.45×3.45mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
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
White 0.15ct Diamond (round cut, 3.45×3.45mm) 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
 37% vs 21%
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 0.15ct Diamond Round (3.45×3.45mm, 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, Diamond will face-up smaller than Tanzanite for a given carat weight, because it has higher specific gravity (3.52 vs. 3.35 - this means it's "heavier" compared to Tanzanite 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) 0.15 Ct Diamond (Round)
8.44×6.25 mm vs 3.45×3.45 mm
49.06 mm²   9.35 mm²
Face-up size outline for 1.9ct Tanzanite (8.44×6.25mm, emerald cut)
Face-up size outline for 0.15ct Diamond (3.45×3.45mm, round cut)
1.9ct Tanzanite Emerald (8.44×6.25mm)
0.15ct Diamond Round (3.45×3.45mm)
Difference: 425% (39.71 mm²)
1.9ct Tanzanite (Emerald, 8.44×6.25mm) has approx. 425% more face-up area than 0.15ct Diamond (Round, 3.45×3.45mm). In other words, it's 5.25x larger.


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