Tourmalinated Quartz (also known as Rutilated Quartz) is a translucent to clear Quartz gemstone with needle-like filaments and threads of black tourmaline running through it. Lava Rock is solidified molten rock that has been expelled by a volcano. It is matte black in color and permeated with tiny cavities. Shiny black Onyx and gunmetal grey Hematite gemstones further enhance the monochromatic color scheme of this necklace.