Xray Ultimate Texture Pack
The Xray Ultimate pack makes all block textures transparent except for ores and liquids. This will make it easy for you to spot ores without having to spend hours mining. Infested stone variants are highlighted too, so that you can avoid mining into them. The pack works in the nether too, helping you find tons of ancient debris quickly.
This might feel like cheating, but there's nothing wrong with using this pack in a single player world. Although, be careful as some multiplayer servers may not allow this pack and you may get kicked/ banned if found using one.
→ Download links are given below.
Follow the procedures described below to install this texture pack into your game
1) Download the texture pack.
2) Most texture packs need Optifine, so make sure to install it.
3) Put the texture pack in .minecraft/resourcepacks folder.