The most common material, and in skilled hands looks like an emerald

One of the university students in Shaanxi Province, who studies jewelry designer, decided to practice craft on ... ordinary glass bottles. For this, he honed his jewelry skills by creating delicious emeralds from green beer bottles. The work of the student was highly appreciated by the teacher, noting how the “stone” was fixed and qualitatively fixed. But we throw out such bottles almost every day, while someone makes emeralds out of them!