Star K Genuine Tanzanite Trillion Triangle Contemporary Modern Designer Ring 14kt Gold This beautiful design is part of the exclusive Star K. Jewelry collection. Star K, is a reputable American Family Business based in New York since 1986, uses only the highest quality materials, and will proudly stand behind all of her products. Tanzanite: The Alternate Birthstone for September. Tanzanite is a rare blue gem and a popular alternative to blue sapphire. The gemstone was discovered in 1967, and it is mined at only one very small mining location in Tanzania. Lifetime Warranty exclusively offered by Finejewelers. High End Jewerly Box and Gift Packaging Width: 7.00 mm Length: 7.00 mm Additional Stones: (0.09 carat white-diamond, Shape: round-shape, Color: L-M, Clarity: I3, Creation: natural, Treatment: not-treated.)