Pros : Upon firing turns a marvelous shade of tanzanite purple.
Cons : Very costly, as are most reds and purples
Other Thoughts : This glass is rather unusual, as in the description, in it's pre-fired form it looks med-blue, but when it is fired it turns into a lovely purple-blue, like a tanzanite color. It closely coordinates with Swarovski's Tanzanite color. Great glass to do smaller fusing projects like pendants and earring because higher costs. It is well worth it to make the investment, if you like the end color.