These are a specific type of stoneware distinguished by their unique, opalescent glazes. Produced primarily during the Song Dynasty in China, these pieces are characterized by a thick, lustrous glaze that often exhibits a cloudy or milky appearance. The effect arises from phase separation within the glaze during firing, creating micro-bubbles that scatter light and impart a soft, ethereal quality. Early examples frequently present a higher iron content within the body. The glaze often presents a blueish or greenish tone, but also can be seen in other varieties.
Their significance lies in their distinctive aesthetic and the technical skill required for their creation. The subtle variations in color and texture within the glaze make each piece unique. They represent a pinnacle of ceramic artistry from their era, showcasing the mastery of glaze chemistry and firing techniques. Furthermore, these items offer insights into the cultural and technological advancements of the Song Dynasty, providing valuable information for researchers and collectors alike.
