The tool durability increases from high speed steel cemented carbide polycrystalline diamond, but that sequence also applies to costs.
Alternatively a block of polycrystalline silicon is sliced to produce the size of wafer required.
Polycrystalline panels are typically more affordable than monocrystalline panels, but they are not as efficient at absorbing sunlight and converting it to usable electricity.
Instead of one large silicon crystal, multiple smaller crystals make up polycrystalline panels.
While they are the cheapest to manufacture, they are less efficient than monocrystalline or polycrystalline panels.