How do you make shell lime from oyster shell?

To make shell lime from oyster shells, first, clean the shells to remove any remaining organic matter. Then, crush the shells into smaller pieces and place them in a kiln or furnace. Heat the crushed shells to around 900–1000 degrees Celsius (1650–1830 degrees Fahrenheit) to initiate calcination, which converts calcium carbonate in the shells to calcium oxide (lime). Once cooled, the resulting quicklime can be hydrated with water to produce slaked lime if needed.