Tourmalinated Quartz Donut Bead with 5.86mm Inner Hole ID and 1.2mm Threading Hole.
 
Tourmalinated Quartz is Quartz containing included needles of Tourmaline.
 
Tourmaline is a crystalline boron silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium.
 
Quartz is found worldwide and forms at any temperature in igneous, metamorphic, and sedimentary rocks. 
 
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* Photos show all sides.
* Sizes, shapes and colors my vary due to being a natural stone, being hand-carved and/or difference in computer monitors.