An Encyclopaedia of Indian Archaeology v1.c21.s8.25

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.