20.5 Carat Tanzanite Oval (22.07×14.71mm, Blue)
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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 |
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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 Class:
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Zoisite |
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Shape:
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Oval |
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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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3.3 |
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Carat weight:
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20.5 ct |
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Gram weight:
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4.1 g (0.1446 ounces) |
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Points:
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2050 pts |
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Length:
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22.07 mm |
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Width:
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14.71 mm |
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Est. face-up size:
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266.21 mm² |
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Volume:
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1242.42 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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1.69 - 1.70 |
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Cleavage:
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1,1 |
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Luster:
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Vitreous |
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Birefringence:
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0.009 |
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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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|
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Birthstone:
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Tanzanite is a birthstone for the month of December |
Popular comparisons:
- 1ct Tanzanite (Oval, Blue, 8.07 x 5.38) vs. 1ct Morganite (Oval, Light Purple, 8.63 x 5.75)
- 2ct Tanzanite (Oval, Blue, 10.16 x 6.77) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
- 2.5ct Tanzanite (Oval, Blue, 10.95 x 7.3) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
- 4.5ct Tanzanite (Oval, Blue, 12 x 10) vs. 5ct Tanzanite (Cushion, Blue, 12 x 8)
- 1ct Tanzanite (Oval, Blue, 8.07 x 5.38) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 20ct Tanzanite (Oval, Blue, 21.89 x 14.59) vs. 20.5ct Tanzanite (Oval, Blue, 22.07 x 14.71)
- 1.69ct Tanzanite (Oval, Blue, 9.6 x 6.4) vs. 3.11ct Tanzanite (Oval, Blue, 11 x 7.33)
- 1ct Tanzanite (Oval, Blue, 8.07 x 5.38) vs. 2ct Sapphire (Oval, Blue, 9.53 x 6.35)
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