Tanzanite is blue Zoisite, a calcium aluminum silicate, and forms in prismatic, usually striated crystals, transparent to slightly opaque, and ranges in color from deep ultramarine blue to light violet-blue. The most coveted crystals are a saturated blue with a hint of purple around it. In raw form, Tanzanite occurs as blue, purple, brown, and yellow. Nearly all Tanzanite is heat-treated to produce the striking violet-blue color and to remove the brownish-yellow areas. Its pleochroism property provides the shift in colors as the crystal is viewed from different perspectives. In artificial light, it appears as an amethyst blue.

Tanzanite Chakra Healing and Balancing Energy. Tanzanite stimulates the Throat, Third Eye, and Crown Chakras, uniting the higher mind with intuition and communication. Tanzanitecarries predominant blue crystal energy that stimulates the Throat Chakra, the voice of the body.