mineral
Sulfur
Native Sulfur (S)
AI-generated identification · may be incorrectHardness: 1.5-2.5 on Mohs scale; Color: Bright yellow to yellowish-brown; Luster: Resinous to greasy; Crystal Structure: Orthorhombic; Cleavage: Poor; Specific Gravity: 2.0-2.1
- Hardness
- 1
- Color
- Bright yellow to yellowish-brown
- Luster
- Resinous to greasy
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Physical properties
Hardness: 1.5-2.5 on Mohs scale; Color: Bright yellow to yellowish-brown; Luster: Resinous to greasy; Crystal Structure: Orthorhombic; Cleavage: Poor; Specific Gravity: 2.0-2.1
Formation & geological history
Formed primarily as a sublimation product from volcanic gases around fumaroles, or as a byproduct of bacterial action on sulfate minerals like gypsum. It can also be found in salt domes and sedimentary deposits.
Uses & applications
Extensively used in the manufacture of sulfuric acid, fertilizers, gunpowder, matches, insecticides, and the vulcanization of rubber. Highly valued by mineral collectors for its vibrant color.
Geological facts
Sulfur has been known since ancient times and is referred to in the Bible as brimstone. It burns with a blue flame and produces a suffocating sulfur dioxide odor.
Field identification & locations
Identified in the field by its distinct bright yellow color, low hardness (can be scratched by a fingernail), and the faint odor of rotten eggs when rubbed or struck. Common locations include Sicily, Italy; Texas and Louisiana, USA; and volcanic regions like Indonesia.
