(1) Alexandrite, an amazing variety of chrysoberyl , changes color in different types of light.(2) A fine greenish-yellow chrysoberyl is currently being found in the gem gravels of the Songea / Tunduru region.(3) Beryllium, another valuable metal associated with the deposits, occurs in a wide variety of minerals, including beryl, chrysoberyl , helvite, phenakite, bavenite, and others.(4) Reflection of light from parallel inclusions or a fibrous structure, known as chatoyancy, is shown best by the cat's-eye variety of chrysoberyl .(5) There's also another gem called chrysoberyl that's really durable and has a higher refractive index than other gems so it throws flashes of color much like a diamond.
