Hidden Pebbles
Discrete Stones
Covert Crag
Clandestine Quarry
Furtive Granite
Low Profile Pebbles
Discrete Geodes
Disguised Crag
Sly Stones
Sneaky Sediments
Inconspicuous Stones
Surreptitious Stones
Tiptoeing Tectonics
Clandestine Quartz
Hermetic Lodestones
Shinobi Nintendium
Ninja Pebbles
Concealed Cobblestones
Obscure Boulders
Unknown Minerals
Sly Rubble
Shady Crags