Amethyst 10mm Round Faceted - 15-16 Inch Mexican Laguna Lace Agate who first catalogued the stone

who first catalogued the stone in 1902

and is a result of trace amounts of copper or chromium

It was named and first described by the Greek philosopher and botanist Theosphrastus in 315 BCE

Iron gives them blue

Amethyst 10mm Round Faceted - 15-16 Inch Mexican Laguna Lace Agate who first catalogued the stoneAmethyst 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