18ct Titanite (Cabochon, 18.71×12.47mm, Yellowish Green) vs 18ct Apatite (Cabochon, 19.32×12.88mm, Green)
Quick summary: When looked from above (face-up position), 18ct Apatite (19.32×12.88mm, cabochon cut) appears 7% larger than 18ct Titanite (18.71×12.47mm, cabochon cut). See below how they compare side-by-side on a ring and finger.
| 18ct Titanite (cabochon cut) |
vs
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18ct Apatite (cabochon cut) |
|
yellowish green |
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| 18.71×12.47 mm | 19.32×12.88 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
18ct Titanite Cabochon (18.71×12.47mm, Yellowish Green)
and
18ct Apatite Cabochon (19.32×12.88mm, 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, Titanite will face-up smaller than Apatite for a given
carat weight, because it has higher specific gravity
(3.53 vs. 3.2 - this means it's "heavier" compared to Apatite 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.
| 18 Ct Titanite (Cabochon) | 18 Ct Apatite (Cabochon) | |
| 18.71×12.47 mm | vs | 19.32×12.88 mm |
| 191.32 mm² | 204.05 mm² |
| 18ct Titanite Cabochon (18.71×12.47mm) | |
| 18ct Apatite Cabochon (19.32×12.88mm) | |
| Difference: 7% (12.73 mm²) |
18ct Apatite (Cabochon, 19.32×12.88mm) has approx. 7% more face-up area than 18ct Titanite (Cabochon, 18.71×12.47mm).
Popular comparisons:
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- 1ct Topaz (Round, Blue, 6 x 6) vs. 0.5ct Topaz (Round, Blue, 5 x 5)