Gameplay Studio launched a Kickstarter in order to fund Dura-Dice, a line of aluminum game dice made from 100% recycled aluminum.
From the campaign:
D6 dice made from 100% recycled aluminum that has been melted, compressed and turned into solid billets. Light weight and simplistic in design for easy rolling. Smooth rounded dice faces that will not scratch your boards games like straight edged metal dice. Replace your standard acrylic style dice with the metal Dura Dice which are designed to last.(Wouldn’t recommend rolling the dice on concrete surfaces).