These earrings are a consistent best seller. Made of dichroic glass, they subtly change in the light. This cooperative started as a collaboration in 1996, with Chilean traditions and nature as inspiration. Using window glass and recycled bottles, the glass is cut to size, painted by hand, then fired in 1500 degree ovens. Recycled glass post earring Hypoallergenic studs, nickel and cadmium free Wrapped in plastic sleeve Measures 1/4" to 3/8" in diameter *WFTO Member* Made by hand is uniquely beautiful. Our products are made by humans, not mass produced on automated machines. Minor imperfections and variations are to be expected as a characteristic of the artistry. Please appreciate these individualities for what they are, a maker pouring their heart and soul into a unique and beautiful piece of work.