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0.05ct Diamond (Cushion, 2.15×2.15mm, White) vs 1ct Tanzanite (Round, 6.37×6.37mm, Blue)


Quick summary: When looked from above (face-up position), 1ct Tanzanite (6.37×6.37mm, round cut) appears 7.7 times larger than 0.05ct Diamond (2.15×2.15mm, cushion cut). See below how they compare side-by-side on a ring and finger.

0.05ct Diamond (cushion cut)
vs
 1ct Tanzanite (round cut)
white
 
blue
2.15×2.15 mm 6.37×6.37 mm
actual size
Actual size of 0.05ct Diamond (cushion cut, 2.15×2.15mm, White color)   Actual size of 1ct Tanzanite (round cut, 6.37×6.37mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 0.05ct Diamond (cushion cut, 2.15×2.15mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 1ct Tanzanite (round cut, 6.37×6.37mm) 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
 13% vs 38%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.05ct Diamond Cushion (2.15×2.15mm, White) and 1ct Tanzanite Round (6.37×6.37mm, 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, 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.


0.05 Ct Diamond (Cushion) 1 Ct Tanzanite (Round)
2.15×2.15 mm vs 6.37×6.37 mm
4.16 mm²   31.87 mm²
Face-up size outline for 1ct Tanzanite (6.37×6.37mm, round cut)
Face-up size outline for 0.05ct Diamond (2.15×2.15mm, cushion cut)
0.05ct Diamond Cushion (2.15×2.15mm)
1ct Tanzanite Round (6.37×6.37mm)
Difference: 666% (27.71 mm²)
1ct Tanzanite (Round, 6.37×6.37mm) has approx. 666% more face-up area than 0.05ct Diamond (Cushion, 2.15×2.15mm). In other words, it's 7.66x larger.


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