White Howlite 7x8mm Faceted Swirl Oval - 15-16 Inch 15x20-20x30 while other impurities in the

while other impurities in the stone may create veining and rich patterns

but is most commonly associated with white

and much of the black Onyx on the market has been artificially colored

laced with bands or swirls of brighter blue

Chrysoprase is a bright apple green

White Howlite 7x8mm Faceted Swirl Oval - 15-16 Inch 15x20-20x30 while other impurities in theWhite 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 to 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.