Tanzanite ranges from ultramarine to sapphire blue in color. It can also appear blue-violet. It is best identified by its refractive index (1.691 to 1.700) and density of 3.35. Its orthorhombic crystal system can also help to distinguish it from some similar gemstones, such as amethyst. Tanzanite exhibits perfect cleavage with an uneven fracture.
Tanzanite is thought to inspire compassion and to encourage calmness. It is also believed to be helpful in facilitating communication and solving problems.Tanzanite; Origin and Gemstone Sources
The color of tanzanite ties it to loyalty, faith, sincerity and respect. Physically, tanzanite is linked to the pineal gland, the pituitary gland, the thyroid gland and the mouth. Additionally, tanzanite has been added to the list of birthstones for those born in December by the American Gem Trade Association
Tanzanite; Origin and Gemstone Sources
Tanzanite is only found in one place on earth; Tanzania, East Africa. The only known deposit of tanzanite is located on a five square mile hilltop at Merelani Hills near Ausha, ten miles south of the Kilimanjaro International Airport in Tanzania.