Atlantisite Stichtite 10x40mm Rectangle Pendant Pair Watermelon Black/White but those varieties are transparent

but those varieties are transparent

pink and pale lilac

is transparent quartz crystal with brilliant sparkle

Historically

Atlantisite Stichtite 10x40mm Rectangle Pendant Pair Watermelon Black/White but those varieties are transparentStichtite is a mineral, a carbonate of chromium and magnesium. Its color ranges from pink through lilac to a rich purple color. Discovered in 1910 on the west coast of Tasmania, Australia, it was first recognised by A. S. Wesley a former chief chemist with the Mount Lyell Mining and Railway Company, it was named after Robert Carl Sticht the manager of the mine. The only commercial mine for stichtite serpentine is located on Stichtite Hill.