How do I make ores more rare?

[L22]

I'm looking at the section in mapgen.lua that displays the register_ore code for the default ores in Minetest Game, and I want to make each ore slightly rarer. Does increasing clust_scarcity make ores more rare?

Thanks.

[paramat]

Yes. See https://github.com/minetest/minetest/bl ... .txt#L6208