Sulfur

Sulfur

Sulfur
 

 

 

 

 

 

 

 

 

 

 

Composition: Sulfur (S)

Synonyms/Varieties:
Brimstone
Selenian
Selensulfur

Physical Properties:
Color: Sulfur yellow, straw to honey yellow, yellowish brown, greenish, reddish, yellowish gray
Streak: White
Luster: Resinous to greasy
Hardness: 1.5-2.5
Tenacity: Brittle, sectile
Specific Gravity: 2.65-2.66
Cleavage: Poor, two directions

Crystallography:
System: Orthorhombic
Twinning: Common
Habit: Crystals are bipyramidal, and thick tabular. Aggregates are massive, crusts, stalactitic, and as a powder.

General Information:
Sulfur is a soft, yellow mineral that easily burns with a bluish flame, giving off the pungent odor of sulfur dioxide. These characteristics, in addition to its resinous luster, allow it to be easily distinguished from other minerals. Sulfur is a relatively common mineral in active or recently active volcanic areas, where it typically forms incrustations in fissures and on rocks at the surface. In places it occurs in large, relatively pure de- posits that can be mined. Notable deposits of sulfur in California are found in Alpine County and in the Last Chance Range, Inyo County. It is principally used to manufacture sulfuric acid, which is very important to industry. Sulfur is also used in fertilizers, insecticides, explosives, rubber, and paper. Name is from the Latin word sulphurum. Foods that contain sulfur include garlic, cabbage, onions, and eggs.

California Counties in Which this Mineral is Found
 

Alpine
Colusa
Imperial
Inyo
Kern
Lake
Mariposa
Mono
Monterey
San Bernardino
Santa Barbara
Shasta
Siskiyou
Sonoma
Ventura
Yolo
 
 

Information on Specimen Photo:
Specimen Description: Sulfur, 7 cm wide, Crater Sulfur Mine, Inyo County. Melanie Dunn Collection.
Photographer: Max Flanery, CGS.