Amethyst 10mm Round Faceted - 15-16 Inch Mexican Laguna Lace Agate The holes in these beads

The holes in these beads are straight

an opaque silicon dioxide mineral and form of microcrystalline Chalcedony

who first catalogued the stone in 1902

Iron gives them blue

The blue colors are photosensitive and may fade when exposed to excessive light or heat

Amethyst 10mm Round Faceted - 15-16 Inch Mexican Laguna Lace Agate The holes in these beadsAmethyst 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