mineral

Sulfur

Native Sulfur (S8)

Hardness: 1.5-2.5 (Mohs); Color: Bright yellow to pale greenish-yellow; Luster: Resinous to greasy; Crystal structure: Orthorhombic; Cleavage: Poor; Specific Gravity: 2.07

Hardness: 1
Color: Bright yellow to pale greenish-yellow
Luster: Resinous to greasy

Identified July 5, 2026More mineral →

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Physical properties

Hardness: 1.5-2.5 (Mohs); Color: Bright yellow to pale greenish-yellow; Luster: Resinous to greasy; Crystal structure: Orthorhombic; Cleavage: Poor; Specific Gravity: 2.07

Formation & geological history

Formed via volcanic sublimation from fumaroles (gas vents) or through the decomposition of sulfate minerals. Found in evaporite deposits and volcanic regions. This specimen's pale yellow color and porous texture are consistent with volcanic sublimation.

Uses & applications

Primary source for manufacturing sulfuric acid, fertilizers, rubber vulcanization, matches, and pharmaceuticals. Collector specimens are valued for their color.

Geological facts

Native sulfur is often called 'brimstone' in historical texts. It has a distinctive odor when rubbed or burned (resembling rotten eggs due to sulfur dioxide release) and burns with a blue flame.

Field identification & locations

Identify by its bright yellow color, low hardness (can be scratched by a fingernail), and low density. Given the coordinates in Sicily, Italy, this is extremely common due to the proximity of Mt. Etna and historical sulfur mines.