Very light rock with lots of small holes
What is this? My grandpa found it in his backyard. It looks like some kind of grey rock, however it is much lighter than a ”normal” rock of that size and it has lots of small holes all around it. It got found in Sweden.
What is this? My grandpa found it in his backyard. It looks like some kind of grey rock, however it is much lighter than a ”normal” rock of that size and it has lots of small holes all around it. It got found in Sweden.