Found in just one place on earth, tanzanite is a relatively recent discovery. Tiffany & Co named this blue-violet variety of zoisite in honor of Tanzania, where it was first unearthed in 1967. Because the crystals show different colors depending on the viewing direction, cutters can fashion gems with a range of color from violetish blue to bluish violet depending on how much weight they want to retain from the rough.
Birthstones and Anniversaries
Tanzanite is one of the birthstones for December, along with zircon, turquoise and blue topaz. Tanzanite is the gem for the 24th anniversary.