Green Tourmaline on Quartz G

Green Tourmaline on Quartz crystal G. There are many opaque Green tourmaline crystals on a quartz matrix that is about 2.5 inches x 2inches. This specimen was found in Nigeria.

Tourmaline Crystals are popular as gemstones and with mineral collectors around the world. Not one mineral but a group of boron silicate minerals that share crystal structue and many of the same physical properties, but with a variety of chemical formulas.