Green Island Cement is turning oyster shells into cement for buildings in Hong Kong. Oyster shells are 91 per cent limestone, which is a key ingredient in cement. Mining limestone usually produces ...

Uncommon is hardly the word for Kauffman’s pharmaceutical firm, which was founded on poker winnings, grew by selling ground oyster shells, and has made wealthy people out of typists and ...

Orange County Coastkeeper earlier in the week received a bounty of oyster shells, 724 pounds worth, from the recently resurrected DTLA Oyster Festival, brought back after a five-year hiatus.

Volunteers from the not-for-profit Ozfish set out on weekly missions to collect oyster shells from large restaurants and shuckers around Brisbane, bringing roughly four tonnes of shell back to ...