"Marvellous were the beaches of Eldamar in those days..."

[anna_wing]

In which life continues to imitate art:

Ussuri Beach near Vladivostock, where years of wave erosion have smoothed out shards of dumped broken glass into gorgeous glass pebbles.

http://siberiantimes.com/PICTURES/OTHERS/Glass-Bay-Vladivostok/inside_bay_1.jpg

Not internally luminescent, unfortunately, but still rather amazing.