5 Ct Spinel (Round) |
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5 Ct Alexandrite (Round) |
red |
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10.59×10.59 mm | 10.49×10.49 mm | |
actual size | ||
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64 mm |
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Actual sizes of
5ct Spinel Round (10.59×10.59mm, Red)
and
5ct Alexandrite Round (10.49×10.49mm, Light 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 Spinel or Alexandrite check what Amazon has to offer. You'll usually find quite a selection from many different vendors. Worth a check. For other high quality gemstones (Rubies, Saphhires, Emeralds) and especially Diamonds, I highly recommend JamesAllen.
Face-up Size
All things being equal, Alexandrite will face-up smaller than Spinel for a given
carat weight, because it has higher specific gravity
(3.7 vs. 3.6 - this means it's "heavier" compared to Spinel 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.
5 Ct Spinel (Round) | 5 Ct Alexandrite (Round) | |
10.59×10.59 mm | vs | 10.49×10.49 mm |
88.08 mm² | 86.43 mm² |


5ct Spinel Round (10.59×10.59mm) | |
5ct Alexandrite Round (10.49×10.49mm) | |
Difference: 2% (1.65 mm²) |
5ct Spinel Round (10.59×10.59mm) has approx. 2% more face-up area than 5ct Alexandrite Round (10.49×10.49mm).
Popular comparisons:
- 5ct Spinel (Round, Red, 10.59 x 10.59) vs. 5ct Alexandrite (Baguette, Dark Green, 12.17 x 8.11)
- 1ct Spinel (Round, Red, 6.19 x 6.19) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 3.7ct Spinel (Round, Red, 9.58 x 9.58) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 1.35ct Spinel (Round, Red, 6.84 x 6.84) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 1ct Spinel (Round, Red, 6.19 x 6.19) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.31ct Spinel (Round, Red, 4.19 x 4.19) vs. 0.07ct Diamond (Round, White, 2.68 x 2.68)
- 0.4ct Spinel (Round, Red, 4.56 x 4.56) vs. 0.07ct Diamond (Round, White, 2.68 x 2.68)
- 0.53ct Spinel (Round, Red, 5.01 x 5.01) vs. 0.1ct Diamond (Round, White, 3.02 x 3.02)
- 0.27ct Spinel (Round, Red, 4 x 4) vs. 0.07ct Diamond (Round, White, 2.68 x 2.68)
Enter your screen size (diagonal)
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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.