Tanzanite is known as being one of the most stunning gems within East Africa? This rare beauty comes in a variety of blue velvety colours, with some even including more of a purple tone. First found in 1967, the name itself came from its origination, Tanzania. Put out into the world market in 1969, the actual color of this gem is always a brownish color. It isn’t until it is heat treated that is becomes the color blue or purple.