2ct Spinel (Round, 7.8×7.8mm, Violet) vs 2ct Tourmaline (Round, 8.2×8.2mm, Violet)
Quick summary: When looked from above (face-up position), 2ct Tourmaline (8.2×8.2mm, round cut) appears 11% larger than 2ct Spinel (7.8×7.8mm, round cut). See below how they compare side-by-side on a ring and finger.
| 2ct Spinel (round cut) |
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2ct Tourmaline (round cut) |
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violet |
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| 7.8×7.8 mm | 8.2×8.2 mm | |
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Actual sizes of
2ct Spinel Round (7.8×7.8mm, Violet)
and
2ct Tourmaline Round (8.2×8.2mm, 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, Spinel will face-up smaller than Tourmaline for a given
carat weight, because it has higher specific gravity
(3.6 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.
| 2 Ct Spinel (Round) | 2 Ct Tourmaline (Round) | |
| 7.8×7.8 mm | vs | 8.2×8.2 mm |
| 47.78 mm² | 52.81 mm² |
| 2ct Spinel Round (7.8×7.8mm) | |
| 2ct Tourmaline Round (8.2×8.2mm) | |
| Difference: 11% (5.03 mm²) |
2ct Tourmaline Round (8.2×8.2mm) has approx. 11% more face-up area than 2ct Spinel Round (7.8×7.8mm).
Popular comparisons:
- 1ct Spinel (Round, Red, 6.19 x 6.19) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 3.7ct Spinel (Round, Red, 9.58 x 9.58) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 1.35ct Spinel (Round, Red, 6.84 x 6.84) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 5ct Spinel (Round, Red, 10.59 x 10.59) vs. 5ct Alexandrite (Round, Light Green , 10.49 x 10.49)
- 1ct Spinel (Round, Red, 6.19 x 6.19) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.4ct Spinel (Round, Red, 4.56 x 4.56) vs. 0.07ct Diamond (Round, White, 2.68 x 2.68)
- 2ct Spinel (Round, Light Orange, 7.5 x 7.5) vs. 2ct Spinel (Round, Light Orange, 7 x 7)
- 0.31ct Spinel (Round, Red, 4.19 x 4.19) vs. 0.07ct Diamond (Round, White, 2.68 x 2.68)
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.