Crimbonium Mine
From A KoL Wiki
When wearing High-Radiation Mining Gear
Shows a Mining system, dropping nugget of Crimbonium (promising chunks) and peppermint tailing (other chunks). Mining uses adventures like usual, unless you have the Oily Legs effect (randomly received from flask of mining oil), then one charge is consumed instead.
If you have the Crimbonar effect (also randomly received from flask of mining oil), you can see all the promising chunks, regardless of whether you're close to them or not. You can also see all promising chunks with Object Detection, as in any standard mine.
Otherwise
You probably shouldn't go into a highly-radioactive mine without wearing some sort of protection.
Occurs when clicking "Crimbonium Mine" in the Desert Beach.