Ve arrived in a cavernous space with walls of dark rock, aggregates of gray igneous minerals, drab brown clays, streaks of rust red.

It is a dark grey metallic mineral which forms acicular prismatic monoclinic crystals.

It is a light grey mineral with Mohs hardness of 5.

It is a gray white metallic mineral crystallizing in the hexagonal system.

Adelite is a mineral that can be blueish-gray, green, gray, yellow, or light green in color and is made of crystals.

It is a white to gray cubic mineral.

Hemusite is a very rare isometric gray mineral containing copper, molybdenum, sulfur, and tin with chemical formula CuSnMoS.

It is a silvery white to steel grey opaque mineral crystallizing in the hexagonal crystal system.

Although Senter finally found a chemist who identified the gray mineral as containing molybdenum in 1895, at the time there was virtually no market for the metal.

Pääkkönenite is a metallic grey mineral with the molecular formula SbAsS.