Glass was among the most expensive crafting materials before the invention of glassblowing techniques. An ancient recipe for making glass is as simple as annealing a molten mixture of silica sand and ...

At first glance, glass and crystal seem identical — both are transparent, shiny, and used to make cups, vases, and chandeliers. But the difference lies in what they’re made of and how they sound, ...

Analysis of the microscopic structure of an ancient shard of Roman glass has revealed how photonic crystals form, and might enable them to be grown. When you purchase through links on our site, we may ...