0.49 ct AAA Topnotch Round Shape (5 x 5 mm) Greenish Blue Tanzanite Gemstone 0.49 ct AAA Topnotch Round Shape (5 x 5 mm) Greenish Blue Tanz

Mohs Hardness - 6.5-7 Found in - Mererani, Tanzania History - Tanzanite is a blue zoisite which is trichroic - meaning it often shows different colors when viewed from different directions. In 1967 a rich violet-blue transparent type of zoisite was discovered in Tanzania. The stone was named after this, the only country they are found, two years later. Tanzanites are now found in blue, green,yellow, pink, and brwon, but all will change to a blue color when heated. The stone was added to the offi