I put together a basic X-Ray texture pack for to help with mining or finding caves/spawners. It makes most stone and useless blocks transparent so only ores, lava, and certain structures are visible.
Let me know if you want a version with transparent lava or without water visibility. Happy mining (responsibly)! x ray minecraft 1.12 2 texture pack
(attach a screenshot showing ores through stone) I put together a basic X-Ray texture pack