1.75ct Tanzanite (Cabochon, 8.75×5.83mm, Blue) vs 1.75ct Topaz (Cabochon, 8.6×5.73mm, Blue)
Quick summary: When looked from above (face-up position), 1.75ct Tanzanite (8.75×5.83mm, cabochon cut) appears 4% larger than 1.75ct Topaz (8.6×5.73mm, cabochon cut). See below how they compare side-by-side on a ring and finger.
| 1.75ct Tanzanite (cabochon cut) |
vs
|
1.75ct Topaz (cabochon cut) |
|
blue |
|
|
| 8.75×5.83 mm | 8.6×5.73 mm | |
| actual size | ||
|
|
|
|
|
||
Actual size is set for screen
|
Ring:
Skin tone:
Ring width: 3.0 mm
|
|
64 mm |
|
|
|||||||||||||||||
|
|||||||||||||||||||||
Actual sizes of
1.75ct Tanzanite Cabochon (8.75×5.83mm, Blue)
and
1.75ct Topaz Cabochon (8.6×5.73mm, 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, Topaz will face-up smaller than Tanzanite for a given
carat weight, because it has higher specific gravity
(3.53 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.
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.
| 1.75 Ct Tanzanite (Cabochon) | 1.75 Ct Topaz (Cabochon) | |
| 8.75×5.83 mm | vs | 8.6×5.73 mm |
| 41.83 mm² | 40.41 mm² |
| 1.75ct Tanzanite Cabochon (8.75×5.83mm) | |
| 1.75ct Topaz Cabochon (8.6×5.73mm) | |
| Difference: 4% (1.42 mm²) |
1.75ct Tanzanite (Cabochon, 8.75×5.83mm) has approx. 4% more face-up area than 1.75ct Topaz (Cabochon, 8.6×5.73mm).
Popular comparisons:
- 1ct Tanzanite (Cabochon, Blue, 7.29 x 4.86) vs. 1ct Morganite (Cabochon, Light Purple, 7.8 x 5.2)
- 8.5ct Tanzanite (Cabochon, Blue, 14.9 x 9.93) vs. 1ct Diamond (Cushion, White, 5.83 x 5.83)
- 0.2ct Tanzanite (Cabochon, Light Blue, 4.26 x 2.84) vs. 1ct Diamond (Oval, Blue, 8.12 x 5.41)
- 2ct Tanzanite (Cabochon, Blue, 9.2 x 6.13) vs. 1.21ct Emerald (Emerald, Green, 7.76 x 5.75)
- 1.55ct Tanzanite (Cabochon, Blue, 8.45 x 5.63) vs. 1ct Emerald (Trillion, Green, 8.01 x 8.01)
- 1ct Tanzanite (Cabochon, Blue, 7.29 x 4.86) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 2.23ct Tanzanite (Cabochon, Blue, 9.54 x 6.36) vs. 2.23ct Diamond (Cabochon, White, 9.33 x 6.22)
- 1ct Tanzanite (Cabochon, Blue, 7.29 x 4.86) vs. 1ct Diamond (Cabochon, White, 7.14 x 4.76)
- 1ct Tanzanite (Cabochon, Blue, 7.29 x 4.86) vs. 1ct Emerald (Oval, Dark Bluish Green, 8.63 x 5.75)