Selenite which is kind of translucent crystal allows the flame of the candle to flicker slightly through the walls of the candle holder. Edges of the candle holders are rough which is natural to selenite. Selenite Candle Holders are shiny and sometimes with whiter areas. Top of each candle holder is polished and the underside is cut flat. Sizes approx, Diameter 8cm, Height 8cm for small and 10 cm for mediumEach holder can vary in style as there are hand cut.