Chalcedony is a translucent to transparent milky quartz with distinctive microscopic crystals arranged in slender fibers & parallel bands. Pure Chalcedony is white to light grey in color. It is porous and can be dyed different colors- while keeping its white streaks and vitreous, waxy look intact. Much of our Chalcedony is completely natural. Chalcedony that has been marked "dyed" has been treated with a two month process to bring out its vivid, stunning & natural colors. These Gemstones are unique, intricately cut & faceted! The hardness & crystal habits of Chalcedony distinguish it from all minerals.