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The production of slave (trade) beads became so popular that literally tons of these beads were used for this purpose. Beads were used as ballast in slave/trade ships for the outbound trip. The beads and other trade items were exchanged for human cargo as well as ivory, gold, and other
Evidence of the use of the blown plate glass method dates back to 1620 in London and was used for mirrors and coach plates. Louis Lucas de Nehou and A. Thevart perfected the process of casting polished plate glass in 1688 in France. Prior to this invention, mirror plates, made from blown "sheet" glass, had been limited in size.
Roman gold glass beads were made by using an inner tube or rod to which the gold leaf was stuck. A larger tube was slid over that and the beads crimped off. Easily transported and very attractive, Roman gold glass beads have been found as far outside the Empire as the Wari-Bateshwar ruins in Bangladesh, and sites in China, Korea, Thailand and ...
Mussel Gold – an old method of gold decoration. It was made by rubbing together gold leaf, sugar and salt, followed by washing to remove solubles; Underglaze decoration is applied, by a number of techniques, onto ware before it is glazed, an example is blue and white wares. Can be applied by a number of techniques.
A glass building facade. Glass is an amorphous (non-crystalline) solid. Because it is often transparent and chemically inert, glass has found widespread practical, technological, and decorative use in window panes, tableware, and optics. Some common objects made of glass are named after the material, e.g. "glass", "glasses", "magnifying glass".
Detail of a gold glass medallion with a portrait of a family, from Alexandria (Roman Egypt), 3rd–4th century (Brescia, Museo di Santa Giulia) [24] Gold sandwich glass or gold glass was a technique for fixing a layer of gold leaf with a design between two fused layers of glass, developed in Hellenistic glass and revived in
Network: a type of mosaic glass made of canes of spirally twisted glass threads of different colours laid side by side. Gold-sandwich glass: also found for the first time during the Hellenistic period. It technique consists of a ‘sandwich’ of two decolorized glass layers which enclose a sheet of gold leaf between them. The vessels were ...
Fourteen- and eighteen-karat gold alloys with silver alone appear greenish-yellow and are referred to as green gold. Blue gold can be made by alloying with iron, and purple gold can be made by alloying with aluminium. Less commonly, addition of manganese, indium, and other elements can produce more unusual colors of gold for various applications.