Astucious Asphalt
Beguiling Basalt
Clandestine Cobblestones
Deceitful Dirt
Espionage Earth
Furtive Flint
Guileful Granite
Hidden Hornfels
Incognito Ingots
Jestful Jasper
Keen Kryptonite
Looming Lignite
Masked Minerals
Nested Nickel
Obscure Ore
Perplexing Pumice
Quiet Quartz
Recondite Rocks
Shrouded Sediment
Tricky Terrain
Undercover Uranium
Veiled Variolite
Wily Wolfram
Xenolithic Xonotlite
Yauld Yttrialite
Zetetic Zircon