4.5 Carat Benitoite (Round, 10.18mm, Blue)
Color:
Actual size is set for screen
How big is a 4.5 carat round-cut Benitoite?
It depends on the cut proportions, but typically a 4.5ct round-cut Benitoite would measure around 10.18 mm (±4%) in diameter. You can check the finger coverage in the simulator below.
Ring:
Skin tone:
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Ring width:
3.0 mm
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Saved...
64 mm
| Your settings | |
|---|---|
Ring |
Gold |
Skin tone |
Light |
Ring diameter |
16.9 mm |
Ring width |
3.0 mm |
Finger length |
64 mm |
Finger coverage |
61 % |
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Saved...
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Ring diameter:
16.9 mm
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Additional Info
Benitoite is a very rare blue gem first discovered in San Benito, California (hence the name). Benitoite is California state’s official gem.
Where to buy?
For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile
Gem Details
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Name:
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Benitoite |
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Shape:
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Round |
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Chemical Formula:
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BaTiSi3O9 |
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Crystal Structure:
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Hexagonal |
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Hardness:
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6 - 6.5 |
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Specific Gravity
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3.65 |
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Carat weight:
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4.5 ct |
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Gram weight:
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0.9 g (0.0317 ounces) |
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Points:
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450 pts |
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Length:
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10.18 mm |
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Width:
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10.18 mm |
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Average diameter:
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10.18 mm |
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Est. face-up size:
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81.39 mm² |
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Volume:
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246.58 mm³ |
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Length-to-width ratio:
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1 |
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Refractive Index:
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1.75-1.80 |
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Luster:
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Vitreous |
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Wearability:
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Care Instructions:
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Color:
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Benitoite can be found in the following colors:
  
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Birthstone:
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Benitoite is not an official birthstone of any month |
Popular comparisons:
- 1ct Benitoite (Round, Light Blue, 6.16 x 6.16) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1ct Benitoite (Round, Blue, 6.16 x 6.16) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 1.27ct Benitoite (Round, Blue, 6.3 x 6.4) vs. 1ct Sapphire (Oval, Blue, 7.56 x 5.04)
- 2ct Benitoite (Round, Blue, 7.77 x 7.77) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 5ct Benitoite (Round, Blue, 10.54 x 10.54) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 0.21ct Benitoite (Round, Blue, 3.5 x 3.5) vs. 0.32ct Benitoite (Round, Blue, 4.2 x 4.2)
- 2ct Benitoite (Round, Blue, 7.77 x 7.77) vs. 1.5ct Diamond (Round, White, 7.44 x 7.44)
- 0.2ct Benitoite (Round, Blue, 3.5 x 3.5) vs. 0.32ct Benitoite (Round, Blue, 4.2 x 4.2)