White Howlite 12x13mm Faceted Hexagon - 15-16 Inch Size_10mm These rocks are extremely common

These rocks are extremely common and make up a significant portion of Earth's crust

Variscite is usually green

Princess Patricia of Connaught

This Fire Opal contains both Opal and the rhyolitic host material in which it is formed

dark specks or veins

White Howlite 12x13mm Faceted Hexagon - 15-16 Inch Size_10mm These rocks are extremely commonWhite 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.