coquina
Image credit: James St. John
Click image to enlarge.
CaCO3 reacts strongly to dilute, cold, HCl (acid)
Image credit: Scott Brande, CC4.0 License
Image credit: James St. John
Click image to enlarge.
CaCO3 reacts strongly to dilute, cold, HCl (acid)
Image credit: Scott Brande, CC4.0 License