Stone mites were crustaceans that clung to spaceships and buildings, consuming hulls and metal plating with a combination of strong, wire-cutting jaws and acidic saliva. They fed specifically on the silicates and complex metals. Three individual stone mites could merge to form a symbiotic ternary that featured a hard shell, which strengthened from electrolytic reactions. As defense, they could weld themselves to a metallic surface and deliver electric shocks through their feeler tails.
These creatures were the work of military genetic engineer Jenna Zan Arbor, who was working for the Confederacy of Independent Systems.
On Ord Tiddell, thousands of stone mites infested its capital Lagabee, with four million planetary residents requesting evacuation. In 19.9 BBY, a freighter called the Spinner crashed near Westport and released an infestation at Kishi; as a result, Armand Isard ordered their release on Orleon.
There were only a few known manners of eliminating these genetically-engineered pests, with one of them being oxidizer foam. When applied, the substance would actually rust the mites to death. Additionally, Jedi healers could use morichro against them.
In 137 ABY, stone mites on Coruscant appeared to be deformed from the sabotage of Yuuzhan Vong terraforming.