~~~MEASUREMENTS AND SIZES~~~ -Gemstone: Natural Tanzanite Crystal -Weight: 11.75 Carats / 2.33 gram -Measure: 16.50 X 9.80 X 9 mm -Pieces: 1 -Color: Blue Violet Pink -Shape: Natural Crystal -Origin: Tanzania -Treatment: Heated Tanzanite Crystal Specimen | Terminated Tanzanite |Tanzanite Crystal | Blue purple pleochroism pleochromatic |Stone |Raw Tanzanite Tanzanite is a rare and precious gemstone variety of the mineral zoisite, characterized by its striking blue to violet-blue hues. Discovered in 1967 in Tanzania, tanzanite has since captivated gem enthusiasts with its vibrant colors and pleochroic nature, displaying different hues when viewed from various angles. Pleochroism in tanzanite refers to the gemstone's ability to exhibit different colors when viewed from different crystallographic directions. Tanzanite is pleochroic, typically showing blue, violet, and sometimes burgundy hues when viewed from different angles. This unique optical phenomenon adds depth and complexity to the gemstone's color, making each tanzanite specimen a captivating and dynamic display of hues.