Stone Polishing

Stone Polishing is a tech from the Mesolithic Era. It unlocks polished stone tools in the Crafter. Along with flint, these tools are manufactured from larger-grained materials such as basalt stone. The labour-intensive, time-consuming method of repeated grinding against an abrasive stone (often using water as a lubricant) increases mechanical strength of tools made in this method.

Required for

 * Flint Sickle
 * Flint Knife

Predecessor tech(s)

 * Bone Polishing

Successor tech(s)

 * Copper Smelting
 * Underground Mining