Mineral Information and Data:

Sulphur
S [CNMNC approved formula]

Named from Latin sulfurum = sulfur.

IMA status : Valid species (Pre-IMA Ancient) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
01.03.05.01  
  (01) Native Elements
  (01.03) with semi-metallic and non-metallic elements
  (01.03.05) Sulfur Polymorph group
  
Nickel-Strunz
(10th edition) :
01.CC.05
  (01) Elements
  (01.C) Metalloids and Nonmetals
  (01.CC) Sulfur-selenium-iodine
  
Crystal system: Orthorhombic System
Point group (H-M): mmm (or 2/m 2/m 2/m) — dipyramidal
Unit cell: a = 10.45 Å, b = 12.84 Å, c = 24.46 Å
Crystal Habit: Crystals bipyramidal, thick tabular or disphenoidal, massive, crusts, stalactites, powdery
Twinning: Rare on {101}, {011} or {110}
  
Color: Sulfur yellow to yellowish brown, yellowish gray
Diaphaneity: Transparent, Translucent
Luster: Resinous, Greasy
Hardness (Mohs): 1.5 to 2.5
Measured Density: 2.07 g/cm3
Cleavage: 4; {001}, {110} and {111} imperfect, {111} parting
Tenacity: Rather brittle to somewhat sectile.
Fracture: Conchoidal to uneven
Streak: White
  
Polymorphism and Series: Dimorphous with rosickyite.
Geologic Setting: A sublimation product at volcanic fumaroles; a product of the activity of biological micro-organisms; as a result of low oxidation potential and highly acidic chemical reactions in mineral deposits; formed by the decomposition of sulfides, especially pyrite, during mine fires; found in sedimentary rocks.
Mineral Association: Gypsum, anhydrite, halite, aragonite, calcite, celestine.
  
Synonyms/varieties: Selensulfur (Se-rich variety), sulfurite, sulfur
Other Properties: Gemstone Extremely Rare. BioMineral.

 

Sulphur
Sulfur associated with gypsum rosettes
Origin: Máchow, Poland
Picture size: 12 x 16 mm
Sample owner: M.A. Zakrzewski
Photo: Pieter Stemvers, Leusden, Netherlands

 

Sulphur
Origin: Baja California, Mexico
Sample size: 6.5 x 5 x 3.2 cm
Photo: Dan Weinrich

 

Sulphur
(zoom-in of above)

 

Sulphur
Sulfur on aragonite
Origin: Girgenti, Agrigento Province, Sicily, Italy
Sample size: 9.9 x 5.4 x 4 cm
Photo: Dan Weinrich

 

Sulphur
(zoom-in of above)

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