12 Carat Sunstone (Round, 15.7mm, Orangey Red)
Color:
Actual size is set for screen
How big is a 12 carat round-cut Sunstone?
It depends on the cut proportions, but typically a 12ct round-cut Sunstone would measure around 15.7 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 | |
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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 |
93 % |
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Saved...
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Ring diameter:
16.9 mm
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Additional Info
Historically associated with the sun, Sunstone is a warm, glowing gemstone admired for its golden, reddish hues. Sunstone is not a traditional monthly birthstone, but it is the official gemstone of Oregon, USA.
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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Sunstone |
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Mineral Group:
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Plagioclase feldspar |
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Shape:
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Round |
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Chemical Formula:
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(Ca,Na)(Al,Si)2Si2O8 |
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Crystal Structure:
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Triclinic |
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Hardness:
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6 - 6.5 |
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Specific Gravity
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2.65 |
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Carat weight:
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12 ct |
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Gram weight:
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2.4 g (0.0847 ounces) |
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Points:
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1200 pts |
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Length:
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15.7 mm |
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Width:
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15.7 mm |
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Average diameter:
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15.7 mm |
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Est. face-up size:
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193.59 mm² |
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Volume:
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905.66 mm³ |
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Length-to-width ratio:
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1 |
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Refractive Index:
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1.52 - 1.55 |
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Luster:
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Vitreous |
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Wearability:
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Good |
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Care Instructions:
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Avoid chemicals, extreme heat or ultrasonic cleaners |
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Color:
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Sunstone can be found in the following colors:
        
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Birthstone:
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Sunstone is not an official birthstone of any month |
Popular comparisons:
- 12ct Sunstone (Round, Orangey Red, 15.7 x 15.7) vs. 12ct Diopside (Round, Green, 14.59 x 14.59)
- 1ct Sunstone (Round, Orangey Red, 6.87 x 6.87) vs. 1ct Andesine (Round, Orange, 6.84 x 6.84)
- 1ct Sunstone (Round, Orangey Red, 6.86 x 6.86) vs. 1ct Emerald (Emerald, Green, 7.26 x 5.38)
- 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)