12.5ct Ruby (Round, 13.87×13.87mm, Red) vs 12ct Sapphire (Round, 13.5×15mm, Orange)
Quick summary: When looked from above (face-up position), 12ct Sapphire (13.5×15mm, round cut) appears 5% larger than 12.5ct Ruby (13.87×13.87mm, round cut). See below how they compare side-by-side on a ring and finger.
| 12.5ct Ruby (round cut) |
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12ct Sapphire (round cut) |
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red |
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| 13.87×13.87 mm | 13.5×15 mm | |
| actual size | ||
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Actual sizes of
12.5ct Ruby Round (13.87×13.87mm, Red)
and
12ct Sapphire Round (13.5×15mm, Orange)
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
Ruby and Sapphire have the same specific gravity so their face-up size
depends on the weight, shape and 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.
| 12.5 Ct Ruby (Round) | 12 Ct Sapphire (Round) | |
| 13.87×13.87 mm | vs | 13.5×15 mm |
| 151.09 mm² | 159.04 mm² |
| 12.5ct Ruby Round (13.87×13.87mm) | |
| 12ct Sapphire Round (13.5×15mm) | |
| Difference: 5% (7.95 mm²) |
12ct Sapphire Round (13.5×15mm) has approx. 5% more face-up area than 12.5ct Ruby Round (13.87×13.87mm).
Popular comparisons:
- 12.5ct Ruby (Round, Red, 13.87 x 13.87) vs. 0.09ct Diamond (Round, Red, 2.91 x 2.91)
- 12.5ct Ruby (Round, Red, 13.87 x 13.87) vs. 4.7ct Ruby (Round, Red, 10.01 x 10.01)
- 12.5ct Ruby (Round, Red, 13.87 x 13.87) vs. 12ct Sapphire (Round, Orange, 15 x 13.5)
- 12.5ct Ruby (Round, Red, 13.87 x 13.87) vs. 16ct Sapphire (Round, Orange, 15 x 13.5)
- 12.5ct Ruby (Round, Red, 13.87 x 13.87) vs. 8ct Ruby (Round, Red, 11.96 x 11.96)
- 12.5ct Ruby (Round, Red, 13.87 x 13.87) vs. 1ct Ruby (Round, Red, 5.98 x 5.98)
- 1ct Ruby (Round, Red, 5.98 x 5.98) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 3ct Ruby (Round, Red, 8.62 x 8.62) vs. 5ct Ruby (Round, Red, 10.22 x 10.22)
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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.