Look deep into nature, and then you will understand everything better. ~Albert Einstein
Because there are so few turquoise-colored stones, one like Amazonite is particularly striking.

Thanks to http://www.mineralminers.com for this amazonite specimen
Ranging in color from light green to blue green — often with white veining — Amazonite is a member of the Feldspar family. It carries a 6-6.5 on the Mohs scale of hardness (1-10) and can be found in shades of white, yellow, pink, red, gray, or even colorless.
The presence of lead is what gives it its color.