Amethyst 6mm Round 15-16 Inch Gold but also for industrial purposes

but also for industrial purposes from watch gears and scientific instruments to sandpaper and other abrasives

Black Tourmaline is a black crystalline aluminum borosilicate mineral with occasional light gray inclusions that appear as flecks or veins

It can be easily confused with other minerals due to its variety of colors and formations

all to knowing eye

Amethyst 6mm Round 15-16 Inch Gold but also for industrial purposesAmethyst is a beautiful purple stone, known as a Gem of Fire by ancient cultures. It has been greatly sought after throughout history and was at times valued as highly as Diamond. Today, this semi to precious variety of quartz is found in many locations around the world. The presence of Manganese within the stone produces the purple hue, and variation of the amount of iron in the stone creates a color range from reddish purple to deep violet to light