I also bought a tanzanite for my wife many years ago when I was in Tanzania on a safari. It's a emerald cut, because that's her favorite, and that's the cut I got for her engagement ring. A jeweler from Florida helped me pick the stone, so I felt pretty good about the purchase. She's never worn it.
Interesting info on tanzanite.
Unlike most gemstones that have a variety of locales, this relatively new stone has only been found in Northern Tanzania. The first gemstone was discovered by Masai tribesman Ali Juuyawatu in 1967.
Tanzanite is a blue gem-quality variety of zoisite and is one of the official birthstones of December. Experts predict that the tanzanite supply could be depleted within the next 20-30 years, making this stone significantly more rare than diamonds.
Buying Tip: Tanzanite ranks 6-7 on the Mohs Scale of Hardness so it is durable enough for everyday wear. The most prized color is a pure blue that is almost indistinguishable from blue sapphire. Most tanzanite owes its color intensity to heat treatment. In order to maximize color potential, seek stones 5 carats of greater.
Average Price Per Carat: $1,200 for high-quality stones.