Sulfur
Carsja, Poland
This specimen measures 15cm x 15cm
Sulfur S
Native elements; sometimes with small amounts of selenium
Color and Luster: Yellow, greenish or reddish yellow, brown, gray; greasy, resinous, adamantine; streak white
Hardness: 1.5-2.5
Cleavage: Poor, two directions
Fracture: Conchoidal, very brittle
Crystals: Orthorhombic; usually steep bipyramids, sometimes tabular; also granular, fibrous, compact, earthy; reniform, stalactitic, incrusting
Photo by Mary Sutherland
Descriptions taken from
The Audubon Society Field Guide to North American Rocks and Minerals