Thank you for viewing. December's birthstone. Its official name is "Natural Zoisite." Discovered in 1967, the gemstone was named "Tanzanite" and was heavily promoted in the United States in 1968. It closely resembles blue sapphire, but possesses a stronger pleochroism, displaying blue, violet, and reddish-brown aurora. It is found only in the Merelani Hills mines of Tanzania, making it a unique stone in the world. Its rarity and the ability to acquire large stones have led to a surge in demand, making it a popular stone. Material: White Gold K18WG Stamped Size: Size 12 Weight: 3.18g Center Stone: Natural Tanzanite 0.48ct Side Stones: Natural Diamond 0.10ct Scratches/Discoloration: None