Renewable Calcite (Similar to Cobblestone/Basalt Generators)

Since Calcite is a Igneous rock, it should generate when Lava & Water meet on top of a Magma block. This would let us build with Calcite renewable as finding Geodes is not a feasible method of getting enough. Generators are used so we do not have to decimate the landscape for Cobblestone to make architecture (If not just the base).