The most recent addition to the December birthstones is tanzanite. This stone comes in shades of purple and bluish purple. This is a very popular stone that was found in Tanzania in 1967. Tanzanite is soft and brittle and care should be taken while wearing it. Tanzanite should not be steamed or clean using any ultrasonic system, nor should it be exposed to sources of heat.
A traditional stone for December.
Luster: vitreous; pearly on cleavages | Hardness: 6.5-7 | Density: 3.35