White Howlite 30mm Coin 8-Inch 48hr_five which may form green stains

which may form green stains or specks on Azurite crystals or aggregates

Shungite has been used as a folk medical treatment since the early 18th century

Rosewood is a hardwood found in the Phillipines

and variation of the amount of iron in the stone creates a color range from reddish purple to deep violet to light lilac

Pietersite is composed of Tiger Eye

White Howlite 30mm Coin 8-Inch 48hr_five which may form green stainsWhite Howlite is named for Canadian mineralogist Henry How, who first discovered the stone in Southern California in 1868. It is typically white or light gray with gray, black or brown veins running through it in web like patterns. Because of its softness, Howlite can be easily dyed and is often treated to be blue for use as a substitute for turquoise.