0.75 Carat Spinel (Radiant, 5.18×5.18mm, Red)
Color:
Actual size is set for screen
How big is a 0.75 carat radiant-cut Spinel?
It depends on the cut parameters and length-to-width ratio, but a typical size of a 0.75ct square radiant-cut Spinel would be around 5.18×5.18 mm (±6%). Check how big it looks on a ring and finger.
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 |
31 % |
|
Saved...
|
|
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Ring diameter:
16.9 mm
|
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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Shape:
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Radiant |
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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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0.75 ct |
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Gram weight:
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0.15 g (0.0053 ounces) |
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Points:
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75 pts |
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Length:
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5.18 mm |
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Width:
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5.18 mm |
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Est. face-up size:
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25.49 mm² |
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Volume:
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41.67 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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Luster:
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Vitreous |
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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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Spinel can be found in the following colors:
                               
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Birthstone:
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Spinel is not an official birthstone of any month |
Popular comparisons:
- 2.7ct Ruby (Pear, Red, 10 x 7) vs. 3ct Ruby (Emerald, Red, 9 x 7)
- 1.5ct Tourmaline (Round, Light Red, 7.45 x 7.45) vs. 1.5ct Sapphire (Round, Light Blue, 6.84 x 6.84)
- 1ct Kyanite (Oval, Blue, 7.77 x 5.18) vs. 1ct Tanzanite (Oval, Blue, 8.07 x 5.38)
- 1ct Aquamarine (Oval, Light Blue, 8 x 6) vs. 1ct Spinel (Oval, Gray, 8 x 6)
- 1.16ct Diamond (Round, White, 6.82 x 6.85) vs. 1.2ct Diamond (Round, White, 6.82 x 6.86)
- 6ct Morganite (Cushion, Light Red, 12 x 10) vs. 3.5ct Sapphire (Cushion, Blue, 8.49 x 8.49)
- 1ct Alexandrite (Round, Bluish Green, 6.14 x 6.14) vs. 1ct Emerald (Emerald, Yellowish Green, 7.28 x 5.39)
- 1ct Sapphire (Baguette, Blue, 6.93 x 4.62) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)