Amethyst 8x10-9x13mm Side Drilled Pebble - 15-16 Inch R0862 Hypersthene is often categorized as

Hypersthene is often categorized as enstatite or ferrosilite

which are classed as minerals

These can also be used to cover knots and fill in gaps in your designs

White African Opal is a white to cream to light tan stone with veining of black or gray

Amethyst 8x10-9x13mm Side Drilled Pebble - 15-16 Inch R0862 Hypersthene is often categorized asAmethyst 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