Tektite Natural 8mm Round - 15-16 Inch Shape_Nugget and veins within the tan

and veins within the tan

as well as gray and white inclusions in marbled patterns

the third to hardest common natural gemstone

Dog Teeth Amethyst has a purple and white striped appearance due to its combination of Amethyst and White Quartz

It is a phyllosilicate composed of silicon

Tektite Natural 8mm Round - 15-16 Inch Shape_Nugget and veins within the tanTektite is a natural glass formed by meteorite collisions with Earth. When moving through the Earths atmosphere, a meteorite builds up heat that is then released into the terrestrial rocks with which it collides, causing the rocks to melt and combine with the remains of the meteorite, forming Tektite. It is composed of silicon dioxide, aluminum oxide and other metal oxides.