Robert collects Black Tourmaline from many locations throughout the Colorado Rocky Mountains. The black color is caused by the presence of titanium atoms embedded in the crystals molecular structure.  
 
Most of the Colorado black tourmaline is porous and includes other tiny particles, which is not suitable for faceting.  However, in one location near Evergreen Station, Colorado Robert found well over 100 quality crystals, and we’ve been faceting them of them over time.  This one is a gorgeous 4.5 carat, 12x7mm rectangular-shaped gemstone.  Robert set it in a Sterling Silver Pendant..
 
Robert Michael Gems – Specializing in Colorado Gemstones®.  Colorado Gemstones® is a registered trademark of Robert Michael Gems.