mineral

Sulfur on Aragonite

Sulfur (S) on Aragonite (CaCO3)

Hardness: 1.5-2.5 for sulfur, 3.5-4 for aragonite. Color: Bright yellow sulfur crystals contrasting with white/colorless aragonite. Luster: Resinous to greasy on sulfur, vitreous to pearly on aragonite. Crystal structure: Orthorhombic for both minerals. Specific gravity: ~2.07 (sulfur), ~2.93 (aragonite).

Hardness: 1

Identified July 29, 2026More mineral →

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Physical properties

Formation & geological history

Formed in sedimentary evaporite deposits, hot springs, or volcanic fumaroles where hydrogen sulfide gas is oxidized, often associated with carbonate matrices like aragonite or calcite.

Uses & applications

Used primarily by mineral collectors, in educational exhibits, and historically in chemical industry processes like sulfuric acid production.

Geological facts

Native sulfur is famous for its intense yellow color and distinct smell when rubbed or heated. Fine specimens often come from famous classic localities such as Sicily.

Field identification & locations

Easily identified by its vivid yellow color, low hardness, and low specific gravity. Notable localities include Agrigento, Italy, and various modern mining regions.