Credits:

mtc_chisel_cobblestone_4: Hugues Ross (https://content.minetest.net/packages/Hugues%20Ross/rpg16/)
mtc_chisel_cobblestone_5: WINNIE (https://content.minetest.net/packages/WINNIE/miner16px/)
mtc_chisel_cobblestone_6: jp (https://content.minetest.net/packages/jp/pixelbox/)
mtc_chisel_cobblestone_8: eyekay (https://content.minetest.net/packages/eyekay/alt_tp/)
mtc_chisel_cobblestone_9: niwla23 (https://content.minetest.net/packages/niwla23/simple/)
mtc_chisel_cobblestone_10: isaiah658 (https://content.minetest.net/packages/isaiah658/the_pixel_pack/)
mtc_chisel_cobblestone_11: Wuzzy (https://content.minetest.net/packages/Wuzzy/retroplus/)