18 Carat Diopside (Cabochon, 19.13×12.75mm, Green)
Color:
Actual size is set for screen
How big is an 18 carat cabochon-cut Diopside?
It depends on the cut parameters and length-to-width ratio, but a typical size of an 18ct cabochon-cut Diopside would be around 19.13×12.75 mm (±6%). The lw ratio of this Diopside is 1.5. See below 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 | |
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Ring |
Gold |
Skin tone |
Light |
Ring diameter |
16.9 mm |
Ring width |
3.0 mm |
Finger length |
64 mm |
Finger coverage |
76 % |
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Saved...
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Ring diameter:
16.9 mm
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Additional Info
Diopside is a beautiful and affordable gem with rich green color that rivals the beauty of Emerald and Tsavorite. Its name comes from Greek words dis (meaning "double") and opsis (meaning "appearance"), referring to its crystal shape.
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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Diopside |
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Shape:
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Cabochon |
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Chemical Formula:
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(Ca,Cr)MgSi2O6 |
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Crystal Structure:
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Monoclinic |
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Hardness:
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5-6 |
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Specific Gravity
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3.3 |
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Carat weight:
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18 ct |
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Gram weight:
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3.6 g (0.127 ounces) |
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Points:
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1800 pts |
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Length:
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19.13 mm |
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Width:
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12.75 mm |
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Est. face-up size:
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200 mm² |
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Volume:
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1090.91 mm³ |
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Length-to-width ratio:
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1.5 |
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Refractive Index:
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1.668 - 1.703 |
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Luster:
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Vitreous |
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Wearability:
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Moderate |
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Care Instructions:
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Relatively soft and prone to scratching |
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Color:
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Diopside can be found in the following colors:
      
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Birthstone:
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Diopside is a birthstone for the month of March |
Popular comparisons:
- 0.1ct Diopside (Cabochon, Yellowish Green, 3.39 x 2.26) vs. 40ct Beryl (Radiant, Green, 21.59 x 21.59)
- 2.73ct Diopside (Cabochon, Green, 10.2 x 6.8) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 2.73ct Diopside (Cabochon, Green, 9.04 x 8.31) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.1ct Diopside (Cabochon, Yellowish Green, 3.39 x 2.26) vs. 40ct Beryl (Marquise, Green, 38.48 x 19.24)
- 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)