Fossil Excavator

The Fossil Excavator in the Fossil Research Center is where you dig for fossils.¹

What you need. A Chisel and a Suspicious Scrap. The Chisel isn't used up; better Chisels have more charges and gemstone slots that give bonuses. The Scrap is used up; it comes from mining in the Glacite Tunnels, from Frozen Corpses, or from the Fossil Essence shop.¹

What you find. A fossil turns up 10% of the time, and all six fossils found this way are equally likely. The rest is other loot; Onyx in the Chisel raises how much.¹ Fossils go to Dr. Stone.