0.18 Carat Spinel Round (3.5×3.5mm, Red)
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Ring width:
3.0 mm
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64 mm
| Your settings | |
|---|---|
Ring |
Gold |
Skin tone |
Light |
Ring diameter |
16.9 mm |
Ring width |
3.0 mm |
Finger length |
64 mm |
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Saved...
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Ring diameter:
16.9 mm
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Additional Info
Spinel is a rare gemstone that occurs in practically all colors. Because of similar properties red and blue Spinels have often been mistaken for Rubies and Sapphires. For example, the Black Prince's Ruby is actually a Spinel.
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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Spinel |
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Mineral Class:
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Spinel |
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Shape:
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Round |
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Chemical Formula:
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MgAl2O4 |
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Crystal Structure:
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Isometric |
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Hardness:
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7.5-8 |
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Specific Gravity
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3.6 |
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Carat weight:
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0.18 ct |
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Gram weight:
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0.04 g (0.0013 ounces) |
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Points:
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18 pts |
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Length:
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3.5 mm |
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Width:
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3.5 mm |
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Average diameter:
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3.5 mm |
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Est. face-up size:
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9.62 mm² |
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Volume:
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10 mm³ |
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Length-to-width ratio:
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1 |
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Refractive Index:
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1.712 - 1.736 |
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Cleavage:
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None |
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Luster:
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Vitreous |
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Birefringence:
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None |
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Wearability:
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Excellent |
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Care Instructions:
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No special or unusual care |
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Color:
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Birthstone:
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Spinel is not an official birthstone for any month |
Popular comparisons:
- 0.18ct Spinel (Round, Red, 3.5 x 3.5) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.18ct Spinel (Round, Red, 3.5 x 3.5) vs. 1ct Spinel (Oval, Red, 7.83 x 5.22)
- 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)
- 5ct Spinel (Round, Red, 10.59 x 10.59) vs. 5ct Alexandrite (Round, Light Green , 10.49 x 10.49)
- 1ct Spinel (Round, Red, 6.19 x 6.19) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.4ct Spinel (Round, Red, 4.56 x 4.56) vs. 0.07ct Diamond (Round, White, 2.68 x 2.68)
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