Specimens Rheniite is a very rare and a very new mineral on the mineral market. It is so new that it is not yet listed in mineral indexes. It is found at the Kudriary Volcano, Iturup Island, Russia and is the only known rhenium mineral. Rhenium has been found as a trace element in columbite , molybdenite , gadolinite and some platinum ores.
Color is a bright metallic silver white.
Luster is metallic. Transparency crystals are opaque. Crystal Habits include tiny thin, platy crystals and disseminated grains and masses. Streak is black. Best Field Indicators are crystal habit, locality and color.