👉 Chalcedonies are a type of glassware made from the chalcedony crystal. They are considered to be one of the most valuable and sought-after types of glassware due to their unique design, craftsmanship, and historical significance. The chalcedony crystal is composed of two layers of glass: the inner layer (the "challace") and the outer layer (the "chalon"). The inner layer is typically a darker blue-green color while the outer layer is a
