mineral

Sulfur (with possible Cullet Glass or Slag imitation)

Native Sulfur (S8)

Hardness: 1.5 - 2.5 on the Mohs scale; Color: Bright yellow to greenish-yellow; Luster: Resin-like to greasy; Crystal Structure: Orthorhombic; Cleavage: Poor/Imperfect; Specific Gravity: 2.07.

Hardness: 1
Color: Bright yellow to greenish-yellow
Luster: Resin-like to greasy

Identified March 30, 2026More mineral →

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Physical properties

Hardness: 1.5 - 2.5 on the Mohs scale; Color: Bright yellow to greenish-yellow; Luster: Resin-like to greasy; Crystal Structure: Orthorhombic; Cleavage: Poor/Imperfect; Specific Gravity: 2.07.

Formation & geological history

Formed primarily through volcanic sublimation (fumaroles) or as a byproduct of bacterial breakdown of sulfate minerals like gypsum. Large deposits are found in salt domes and sedimentary strata.

Uses & applications

Used extensively in the chemical industry for sulfuric acid production, fertilizers, rubber vulcanization, gunpowder, and pharmaceuticals. High-purity crystals are popular among mineral collectors.

Geological facts

Sulfur is historically known as 'brimstone.' While it is odorless in its pure solid form, it produces a pungent 'rotten egg' smell (hydrogen sulfide) when reacting with moisture or burned.

Field identification & locations

Identify in the field by its distinct bright yellow color, low density (it feels light), and ability to melt at low temperatures. Common locations include Sicily (Italy), the Gulf Coast (USA), and volcanic regions like Indonesia.

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