8ct Diamond (Cushion, 11.65×11.65mm, White) vs 9ct Tourmaline (Cushion, 12.66×12.66mm, Violet)
Quick summary: When looked from above (face-up position), 9ct Tourmaline (12.66×12.66mm, cushion cut) appears 18% larger than 8ct Diamond (11.65×11.65mm, cushion cut). See below how they compare side-by-side on a ring and finger.
| 8ct Diamond (cushion cut) |
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9ct Tourmaline (cushion cut) |
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white |
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| 11.65×11.65 mm | 12.66×12.66 mm | |
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Actual sizes of
8ct Diamond Cushion (11.65×11.65mm, White)
and
9ct Tourmaline Cushion (12.66×12.66mm, Violet)
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 Tourmaline for a given
carat weight, because it has higher specific gravity
(3.52 vs. 3.1 - this means it's "heavier" compared to Tourmaline 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.
| 8 Ct Diamond (Cushion) | 9 Ct Tourmaline (Cushion) | |
| 11.65×11.65 mm | vs | 12.66×12.66 mm |
| 122.15 mm² | 144.25 mm² |
| 8ct Diamond Cushion (11.65×11.65mm) | |
| 9ct Tourmaline Cushion (12.66×12.66mm) | |
| Difference: 18% (22.1 mm²) |
9ct Tourmaline Cushion (12.66×12.66mm) has approx. 18% more face-up area than 8ct Diamond Cushion (11.65×11.65mm).
Popular comparisons:
- 8ct Diamond (Cushion, White, 11.65 x 11.65) vs. 4ct Diamond (Cushion, White, 9.26 x 8.75)
- 8ct Diamond (Cushion, White, 11.65 x 11.65) vs. 23.29ct Diamond (Cushion, White, 16.64 x 16.64)
- 8ct Diamond (Cushion, White, 11.65 x 11.65) vs. 5ct Diamond (Marquise, White, 17.76 x 8.88)
- 8ct Diamond (Cushion, White, 11.65 x 11.65) vs. 5ct Diamond (Round, White, 11.11 x 11.11)
- 8ct Diamond (Cushion, White, 11.65 x 11.65) vs. 6ct Diamond (Cushion, White, 12.01 x 9.72)
- 8ct Diamond (Cushion, White, 11.65 x 11.65) vs. 0.5ct Diamond (Round, White, 5.16 x 5.16)
- 8ct Diamond (Cushion, White, 11.65 x 11.65) vs. 0.5ct Diamond (Trillion, White, 6.14 x 6.14)
- 8ct Diamond (Cushion, White, 11.65 x 11.65) vs. 9ct Diamond (Cushion, White, 12.12 x 12.12)
Enter your screen size (diagonal)
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Actual size is currently adjusted to screen.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.