1.5ct Sapphire (Oval, 8.66×5.77mm, Dark Blue) vs 3.4ct Topaz (Oval, 11.85×7.9mm, Bluish Green)
Quick summary: When looked from above (face-up position), 3.4ct Topaz (11.85×7.9mm, oval cut) appears 87% larger than 1.5ct Sapphire (8.66×5.77mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 1.5ct Sapphire (oval cut) |
vs
|
3.4ct Topaz (oval cut) |
|
dark blue |
|
|
| 8.66×5.77 mm | 11.85×7.9 mm | |
| actual size | ||
|
|
|
|
|
||
Actual size is set for screen
|
Ring:
Skin tone:
Ring width: 3.0 mm
|
|
64 mm |
|
|
|||||||||||||||||
|
|||||||||||||||||||||
Actual sizes of
1.5ct Sapphire Oval (8.66×5.77mm, Dark Blue)
and
3.4ct Topaz Oval (11.85×7.9mm, Bluish Green)
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, Sapphire will face-up smaller than Topaz for a given
carat weight, because it has higher specific gravity
(4 vs. 3.53 - this means it's "heavier" compared to Topaz 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.
| 1.5 Ct Sapphire (Oval) | 3.4 Ct Topaz (Oval) | |
| 8.66×5.77 mm | vs | 11.85×7.9 mm |
| 40.97 mm² | 76.76 mm² |
| 1.5ct Sapphire Oval (8.66×5.77mm) | |
| 3.4ct Topaz Oval (11.85×7.9mm) | |
| Difference: 87% (35.79 mm²) |
3.4ct Topaz (Oval, 11.85×7.9mm) has approx. 87% more face-up area than 1.5ct Sapphire (Oval, 8.66×5.77mm).
Popular comparisons:
- 1.5ct Sapphire (Oval, Dark Blue, 8.66 x 5.77) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1.5ct Sapphire (Oval, Dark Blue, 8.66 x 5.77) vs. 0.3ct Emerald (Oval, Green, 5.78 x 3.85)
- 1.5ct Sapphire (Oval, Dark Blue, 8.66 x 5.77) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
- 1.5ct Sapphire (Oval, Dark Blue, 8.66 x 5.77) vs. 3ct Emerald (Emerald, Green, 10.5 x 7.78)
- 1.5ct Sapphire (Oval, Dark Blue, 8.66 x 5.77) vs. 0.3ct Emerald (Cushion, Green, 4.27 x 4.27)
- 1.5ct Sapphire (Oval, Dark Blue, 8.66 x 5.77) vs. 0.3ct Emerald (Emerald, Green, 4.87 x 3.61)
- 1.5ct Sapphire (Oval, Dark Blue, 8.66 x 5.77) vs. 3.4ct Topaz (Emerald, Bluish Green, 10 x 7.41)
- 1.5ct Sapphire (Oval, Dark Blue, 8.66 x 5.77) vs. 13.3ct Amethyst (Oval, Dark Purple, 20.55 x 13.7)