4.5ct Benitoite (Cabochon, 11.66×7.77mm, Blue) vs 4.5ct Tanzanite (Cabochon, 11.99×7.99mm, Blue)
Quick summary: When looked from above (face-up position), 4.5ct Tanzanite (11.99×7.99mm, cabochon cut) appears 6% larger than 4.5ct Benitoite (11.66×7.77mm, cabochon cut). See below how they compare side-by-side on a ring and finger.
| 4.5ct Benitoite (cabochon cut) |
vs
|
4.5ct Tanzanite (cabochon cut) |
|
blue |
|
|
| 11.66×7.77 mm | 11.99×7.99 mm | |
| actual size | ||
|
|
|
Actual size is set for screen
|
Ring:
Skin tone:
Ring width: 3.0 mm
|
|
64 mm |
|
|
|||||||||||||||||
|
|||||||||||||||||||||
Actual sizes of
4.5ct Benitoite Cabochon (11.66×7.77mm, Blue)
and
4.5ct Tanzanite Cabochon (11.99×7.99mm, 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, Benitoite will face-up smaller than Tanzanite for a given
carat weight, because it has higher specific gravity
(3.65 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.
| 4.5 Ct Benitoite (Cabochon) | 4.5 Ct Tanzanite (Cabochon) | |
| 11.66×7.77 mm | vs | 11.99×7.99 mm |
| 74.29 mm² | 78.56 mm² |
| 4.5ct Benitoite Cabochon (11.66×7.77mm) | |
| 4.5ct Tanzanite Cabochon (11.99×7.99mm) | |
| Difference: 6% (4.27 mm²) |
4.5ct Tanzanite (Cabochon, 11.99×7.99mm) has approx. 6% more face-up area than 4.5ct Benitoite (Cabochon, 11.66×7.77mm).
Popular comparisons:
- 2ct Benitoite (Cabochon, Blue, 8.9 x 5.93) vs. 2.27ct Sapphire (Cabochon, Light Blue, 8 x 6.1)
- 1.75ct Benitoite (Cabochon, Dark Blue, 8.51 x 5.67) vs. 3.12ct Sinhalite (Cabochon, Brown, 10.47 x 6.98)
- 2.7ct Ruby (Pear, Red, 10 x 7) vs. 3ct Ruby (Emerald, Red, 9 x 7)
- 1.5ct Tourmaline (Round, Light Red, 7.45 x 7.45) vs. 1.5ct Sapphire (Round, Light Blue, 6.84 x 6.84)
- 1ct Kyanite (Oval, Blue, 7.77 x 5.18) vs. 1ct Tanzanite (Oval, Blue, 8.07 x 5.38)
- 1ct Aquamarine (Oval, Light Blue, 8 x 6) vs. 1ct Spinel (Oval, Gray, 8 x 6)
- 1.16ct Diamond (Round, White, 6.82 x 6.85) vs. 1.2ct Diamond (Round, White, 6.82 x 6.86)
- 6ct Morganite (Cushion, Light Red, 12 x 10) vs. 3.5ct Sapphire (Cushion, Blue, 8.49 x 8.49)
- 1ct Alexandrite (Round, Bluish Green, 6.14 x 6.14) vs. 1ct Emerald (Emerald, Yellowish Green, 7.28 x 5.39)