Opalware, also known as opal glass or opalescent glass, is a type of glass that exhibits a milky, translucent appearance, often with a play of colors reminiscent of opal gemstones. It is commonly used in decorative items, tableware, and art glass due to its unique aesthetic qualities. The opalescent effect is achieved through the addition of specific minerals and treatments during the glass-making process, which scatter light and create soft, luminous colors. Opalware can vary in thickness and finish, ranging from smooth to textured surfaces.
Bone china is a durable and translucent china that contains some calf bone to help the mixture set. Opalware is a pale white ceramic that is also known as porcelain. opal ware is also called opal glassware because it is actually hard translucent glass whereas porcelain is breakable.
Opals are formed when silica (SiO2) spheres all of a similar size, are arranged into a cubic close packed structure. This structure has the ability to diffract certain wavelengths of light based on the spacing in between layers of silica and the size of the spheres that make up the FCC lattice too. This is the basis for photonic crystals that can be created synthetically today.