Decomposition

[newpotato]

did u know it takes glass one million years to decompose....how would they know that?

[terambulan]

and I thought glass was made from sand?

Glass does melt under high temperature and can be re-blown!

Puzzles me as to how remote tribes have glass necklaces - where do they get their beads?

[pug100]

Treambulan,
Early civilisations got their glass from or near volcanoes a product called obsidian mainly used for weapons and tools.

http://en.wikipedia.org/wiki/Obsidian

http://en.wikipedia.org/wiki/Glass#History

Nowadays the tribes probably get their beads from China like everyone else ☺