These Lavender Optical Calcite pieces are beautifully clear with the softest hint of lavender-purple. Natural internal veils and fractures catch the light beautifully from different angles. Optical Calcite is a highly transparent variety of calcite, composed of calcium carbonate and known for its fascinating double-refraction effect, which can make objects viewed through it appear doubled. Please note these particular pieces have had a resin polish finish Selection Type: Pick Your OwnLocality: Madagascar Disclaimer: Crystals are natural products and each piece is unique, so variations, natural lines, inclusions, pockets and imperfections may occur. Please handle with care and keep out of reach of young children. Crystals are for decorative purposes and are not for consumption.