Amethyst 4mm Round - 15-16 Inch R0007 displaying these colors in patterns

displaying these colors in patterns of parallel bands

It's soft chatoyancy is reminiscent of the moon's light

Agate is one of many varieties of banded Chalcedony

Opalite is known by several other names

the third to hardest common natural gemstone

Amethyst 4mm Round - 15-16 Inch R0007 displaying these colors in patternsAmethyst 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