1.5ct Tourmaline (Marquise, 12.3×6.15mm, Violet) vs 2ct Diamond (Round, 8.19×8.19mm, White)
Quick summary: When looked from above (face-up position), 1.5ct Tourmaline (12.3×6.15mm, marquise cut) appears 2% larger than 2ct Diamond (8.19×8.19mm, round cut). See below how they compare side-by-side on a ring and finger.
| 1.5ct Tourmaline (marquise cut) |
vs
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2ct Diamond (round cut) |
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violet |
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| 12.3×6.15 mm | 8.19×8.19 mm | |
| actual size | ||
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Actual size is set for screen
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Ring:
Skin tone:
Ring width: 3.0 mm
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64 mm |
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Actual sizes of
1.5ct Tourmaline Marquise (12.3×6.15mm, Violet)
and
2ct Diamond Round (8.19×8.19mm, White)
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. 3.06 - 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.
| 1.5 Ct Tourmaline (Marquise) | 2 Ct Diamond (Round) | |
| 12.3×6.15 mm | vs | 8.19×8.19 mm |
| 53.71 mm² | 52.68 mm² |
| 1.5ct Tourmaline Marquise (12.3×6.15mm) | |
| 2ct Diamond Round (8.19×8.19mm) | |
| Difference: 2% (1.03 mm²) |
1.5ct Tourmaline (Marquise, 12.3×6.15mm) has approx. 2% more face-up area than 2ct Diamond (Round, 8.19×8.19mm).
Popular comparisons:
- 2.5ct Tourmaline (Marquise, Violet, 14.58 x 7.29) vs. 2.5ct Sapphire (Marquise, Blue, 13.4 x 6.7)
- 1.09ct Tourmaline (Marquise, Dark Violet, 11.06 x 5.53) vs. 1.21ct Diamond (Marquise, White, 11.06 x 5.53)
- 1ct Tourmaline (Marquise, Violet, 10.74 x 5.37) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.75ct Tourmaline (Marquise, Bluish Green, 9.7 x 4.15) vs. 0.74ct Tourmaline (Cushion, Bluish Green, 5.78 x 4.78)
- 2.5ct Tourmaline (Marquise, Violet, 14.58 x 7.29) vs. 2.5ct Diamond (Marquise, White, 14.1 x 7.05)
- 1.58ct Tourmaline (Marquise, Violet, 12.52 x 6.26) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 2ct Tourmaline (Marquise, Light Green , 13.54 x 6.77) vs. 2.5ct Tourmaline (Marquise, Violet, 14.58 x 7.29)
- 2.5ct Tourmaline (Marquise, Violet, 14.58 x 7.29) vs. 2ct Tourmaline (Marquise, Violet, 13.54 x 6.77)