[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Reference works](https://indike.org/pramana/ins.reference) › [An Encyclopaedia of Indian Archaeology](https://indike.org/pramana/ins.reference.ghosh-1989) › v1.c21.s8.25 # An Encyclopaedia of Indian Archaeology v1.c21.s8.25 An Encyclopaedia of Indian Archaeology v1.c21.s8.25 - **Language:** English ### [v1.c21.s8.25](https://indike.org/pramana/ins.reference.ghosh-1989.v1.c21.s8.25) Spectrochemical analysis of five specimens from TRIPURĪ has shown a lump of transparent bluish-green glass (300 to 100 B C.) to be a soda-lime silicate containing lead and copper which account for the colour. A blue tube-glass bead datable to c. 100 B.C. to A.D. 200 has also been found to be of soda-lime silicate, the colour being due to copper. Of particular significance are the other three specimens—a green bead (100 B.C. to A.D 200) and two blue beads (A.D. 200-400), which have been found to contain 3 to 5% barium and a high proportion of lead. Barium has not been found in any other Indian glass specimen. - [Previous: v1.c21.s8.24](https://indike.org/pramana/ins.reference.ghosh-1989.v1.c21.s8.24) - [Next: v1.c21.s8.26](https://indike.org/pramana/ins.reference.ghosh-1989.v1.c21.s8.26) - [Up: v1.c21.s8](https://indike.org/pramana/ins.reference.ghosh-1989.v1.c21.s8) --- Source: [https://indike.org/pramana/ins.reference.ghosh-1989.v1.c21.s8.25](https://indike.org/pramana/ins.reference.ghosh-1989.v1.c21.s8.25) · Pramāṇa