ARSENIC
Arsenic is one of the semimetals/metalloids. It
has a metallic luster and bright silvery gray color on freshly broken
surfaces. Weathered, tarnished surfaces have a very dull metallic to
nonmetallic luster and dark gray color. Arsenic has a gray streak, no
cleavage, and is moderately soft (H = 3.5). Like all
semimetals/metalloids, arsenic is not malleable - it breaks along fractures.
Arsenic
(3.0 cm across) from Andreasberg, Harz Mountains, Germany.