'The earliest man-made examples of this silica & borate material were beads made in the 1500s B.C.'
glass
TECHNOLOGY OF THE PAST: The earliest man-made examples of this silica & borate material were beads made in the 1500s B.C.
The earliest man-made examples of this silica & borate material were beads made in the 1500s B.C.
The earliest man-made examples of this silica & borate material were beads made in the 1500s B.C.
TECHNOLOGY OF THE PAST
glass
TECHNOLOGY OF THE PAST