4ct Diamond (Marquise, 16.48×8.24mm, White) vs 4ct Quartz (Marquise, 17.98×8.99mm, White)
Quick summary: When looked from above (face-up position), 4ct Quartz (17.98×8.99mm, marquise cut) appears 19% larger than 4ct Diamond (16.48×8.24mm, marquise cut). See below how they compare side-by-side on a ring and finger.
| 4ct Diamond (marquise cut) |
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4ct Quartz (marquise cut) |
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white |
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| 16.48×8.24 mm | 17.98×8.99 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
4ct Diamond Marquise (16.48×8.24mm, White)
and
4ct Quartz Marquise (17.98×8.99mm, 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 Quartz for a given
carat weight, because it has higher specific gravity
(3.52 vs. 2.65 - this means it's "heavier" compared to Quartz 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 Ct Diamond (Marquise) | 4 Ct Quartz (Marquise) | |
| 16.48×8.24 mm | vs | 17.98×8.99 mm |
| 96.41 mm² | 114.76 mm² |
| 4ct Diamond Marquise (16.48×8.24mm) | |
| 4ct Quartz Marquise (17.98×8.99mm) | |
| Difference: 19% (18.35 mm²) |
4ct Quartz (Marquise, 17.98×8.99mm) has approx. 19% more face-up area than 4ct Diamond (Marquise, 16.48×8.24mm).
Popular comparisons:
- 4ct Diamond (Marquise, White, 16.48 x 8.24) vs. 5ct Diamond (Marquise, White, 16.59 x 8.86)
- 4ct Diamond (Marquise, White, 16.48 x 8.24) vs. 3ct Diamond (Marquise, White, 15.32 x 7.56)
- 4ct Diamond (Marquise, White, 16.48 x 8.24) vs. 7ct Diamond (Oval, White, 16 x 10)
- 4ct Diamond (Marquise, White, 16.48 x 8.24) vs. 3ct Diamond (Marquise, White, 13.4 x 7.6)
- 4ct Diamond (Marquise, White, 16.48 x 8.24) vs. 3ct Diamond (Pear, White, 13.05 x 7.86)
- 4ct Diamond (Marquise, White, 16.48 x 8.24) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 4ct Diamond (Marquise, White, 16.48 x 8.24) vs. 3ct Morganite (Emerald, Light Purple, 10.5 x 7.78)
- 4ct Diamond (Marquise, White, 16.48 x 8.24) vs. 4.5ct Diamond (Marquise, White, 17.14 x 8.57)