| Analysis of Early Glass Objects from Nevasa
Excavations in India |
ARUN K. V ARSHNEYA, STEPHEN S. C. TONG, VJSHWAS GOGTE
Pages : 149-155
DOI : 10.1080/0371750X.1988.10822913 |
| Abstract |
| Some of the man-made objects (beads, pieces of bangles/rings, and
slag fragments) dating as far back as about 700 B.C., and recovered
in the Nevasa excavations (west-central India) have been analyzed
using an electron microprobe analyzer. The exposed surfaces showed
almost total absence of alkalis, indicating leaching effect. A surface
layer, roughly 230 p.m thick, showing differential etching, was observed.
The interiors (after limited sectioning) showed presence of
Na20 and K20 (generally 12~21 wt %), Si02, relatively low CaO,
somewhat high Al20., and a wide use of colorants such as Fe30 4,
and MnO. Chloride concentrations as high as 1.5% were detected.
The low CaO contents generally fit Brills criteria for glasses of
Indian origin. However, many of the glasses did have quite low Al20 3
content in contrast with Brills findings. |
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