18ct Hiddenite (Cabochon, 19.37×12.91mm, Light Green ) vs 18ct Diopside (Cabochon, 19.13×12.75mm, Green)
Quick summary: When looked from above (face-up position), 18ct Hiddenite (19.37×12.91mm, cabochon cut) appears 3% larger than 18ct Diopside (19.13×12.75mm, cabochon cut). See below how they compare side-by-side on a ring and finger.
| 18ct Hiddenite (cabochon cut) |
vs
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18ct Diopside (cabochon cut) |
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light green |
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| 19.37×12.91 mm | 19.13×12.75 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 Hiddenite Cabochon (19.37×12.91mm, Light Green )
and
18ct Diopside Cabochon (19.13×12.75mm, 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, Diopside will face-up smaller than Hiddenite for a given
carat weight, because it has higher specific gravity
(3.3 vs. 3.18 - this means it's "heavier" compared to Hiddenite 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 Hiddenite (Cabochon) | 18 Ct Diopside (Cabochon) | |
| 19.37×12.91 mm | vs | 19.13×12.75 mm |
| 205.05 mm² | 200 mm² |
| 18ct Hiddenite Cabochon (19.37×12.91mm) | |
| 18ct Diopside Cabochon (19.13×12.75mm) | |
| Difference: 3% (5.05 mm²) |
18ct Hiddenite (Cabochon, 19.37×12.91mm) has approx. 3% more face-up area than 18ct Diopside (Cabochon, 19.13×12.75mm).
Popular comparisons:
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- 1ct Topaz (Round, Blue, 6 x 6) vs. 0.5ct Topaz (Round, Blue, 5 x 5)