mineral

Sulfur on Quartz

Native Sulfur (S8) with Quartz (SiO2)

Hardness: 1.5-2.5 (Sulfur) / 7 (Quartz); Color: Bright yellow on white/clear; Luster: Resinous to Vitreous; Crystal Structure: Orthorhombic (Sulfur) / Trigonal (Quartz); Specific Gravity: 2.0-2.1 (Sulfur).

Hardness: 1
Color: Bright yellow on white/clear
Luster: Resinous to Vitreous

Identified May 10, 2026More mineral →

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Physical properties

Formation & geological history

Formed as a secondary mineral via sublimation from volcanic gases (fumaroles) or through the weathering of sulfide minerals. Often found in hydrothermal veins and evaporite deposits.

Uses & applications

Sulfur is used in the manufacture of sulfuric acid, fertilizers, gunpowder, and rubber vulcanization. Specimens are highly valued by collectors for their vibrant color.

Geological facts

Sulfur is famous for its 'rotten egg' smell when burned or reacted. It has been known since ancient times and is referred to as 'brimstone' in the Bible.

Field identification & locations

Identify in the field by its distinct bright yellow color, low melting point, and faint odor when rubbed. Commonly found near active volcanoes, hot springs, and in underground salt domes.

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