Custom Ore Generation 1.2.26 is a release file of the Minecraft mod CustomOreGen, made for Minecraft 1.7.10. It was published on October 9, 2016 and is 0.6 MB in size. For the full description, screenshots and every other version, visit the CustomOreGen mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.