Old ores for 1.17.zip is a release file of the Minecraft resource pack Old Ores for the Cave Update, made for Minecraft 1.17. It was published on March 7, 2021 and is 0 MB in size. For the full description, screenshots and every other version, visit the Old Ores for the Cave Update resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.