Natural tanzanite is a beautiful blue-violet gemstone that is prized for its unique color and properties. It is a variety of the mineral zoisite and is primarily found in Tanzania, specifically in the Merelani Hills. Natural tanzanite typically exhibits a rich, deep blue color, often with violet undertones, which can vary in intensity depending on the crystal's quality and the angle of light.

One of the most fascinating features of natural tanzanite is its strong pleochroism, meaning it can display different colors when viewed from different angles. This can result in stunning visual effects, with shades of blue, violet, and even burgundy appearing as the stone is rotated.

In terms of durability, natural tanzanite has a Mohs hardness of 6 to 7, making it relatively soft compared to other gemstones, so it should be handled with care to avoid scratches.

Metaphysically, natural tanzanite is believed to promote spiritual growth, enhance communication, and provide calming energy. It is often associated with the throat chakra, which is linked to self-expression and truth. This makes natural tanzanite a popular choice not only for its beauty but also for its emotional and spiritual significance.