High quality does not mean invisible to anti-cheat. Servers with Anti-X-Ray plugins (like Orebfuscator) will send fake ore packets. On those servers, X-ray shows diamonds everywhere, but when you mine them, they turn into stone. Do not use X-ray on premium Eaglercraft servers that advertise anti-cheat.

Eaglercraft , which is a browser-based version of Minecraft (typically 1.5.2 or 1.8.8), obtaining "high quality" X-ray functionality is usually achieved through Resource Packs or specialized rather than standard Forge mods, as it runs in JavaScript. 1. High-Quality Resource Packs (Safest Method)

: Best if you are an admin or just want to see ores after dying; it highlights resources while in spectator mode without cluttering regular gameplay. How to Install X-Ray on Eaglercraft