8 Carat Tanzanite (Radiant, 11.69×11.69mm, Blue)
Color:
Actual size is set for screen
How big is an 8 carat radiant-cut Tanzanite?
It depends on the cut parameters and length-to-width ratio, but a typical size of an 8ct square radiant-cut Tanzanite would be around 11.69×11.69 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 |
70 % |
|
Saved...
|
|
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Ring diameter:
16.9 mm
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Additional Info
Tanzanite is a blue variety of the mineral Zoisite. It got its name after the East African country of Tanzania, were it was discovered in 1967. Most of Tanzanite on the market today is heat treated.
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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Tanzanite |
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Mineral Group:
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Zoisite |
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Shape:
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Radiant |
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Chemical Formula:
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Ca2Al3(SiO4)3(OH) |
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Crystal Structure:
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Orthorhombic |
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Hardness:
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6-6.5 |
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Specific Gravity
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3.35 |
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Carat weight:
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8 ct |
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Gram weight:
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1.6 g (0.0564 ounces) |
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Points:
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800 pts |
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Length:
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11.69 mm |
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Width:
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11.69 mm |
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Est. face-up size:
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129.82 mm² |
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Volume:
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477.61 mm³ |
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Length-to-width ratio:
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1 |
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Refractive Index:
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1.69 - 1.70 |
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Luster:
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Vitreous |
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Wearability:
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Very good |
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Care Instructions:
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gentle wear recommended |
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Color:
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Tanzanite can be found in the following colors:
 
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Birthstone:
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Tanzanite is a birthstone for the month of December |
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)