mineral
Likely sulfur-bearing rock (possibly native sulfur)
Native sulfur (S), though the image alone cannot confirm the specimen’s identity
AI-generated identification · may be incorrectYellow, rough and granular; sulfur has Mohs hardness 1.5–2.5, resinous to greasy luster, and orthorhombic crystals. The specimen’s texture and composition are not clear enough to assess reliably from the photo.
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Physical properties
Yellow, rough and granular; sulfur has Mohs hardness 1.5–2.5, resinous to greasy luster, and orthorhombic crystals. The specimen’s texture and composition are not clear enough to assess reliably from the photo.
Formation & geological history
Native sulfur forms around volcanic fumaroles and in sedimentary evaporite deposits, often through oxidation of hydrogen sulfide; deposits span many geological ages.
Uses & applications
Sulfur is used chiefly to manufacture sulfuric acid and fertilizers, and in chemicals and rubber processing; attractive crystals are collected.
Geological facts
Native sulfur is very soft and brittle, and can have a distinctive odor when impurities are present; avoid burning or deliberately heating it.
Field identification & locations
The yellow color is suggestive but not diagnostic; confirm with tests by a mineral specialist, since many yellow minerals and rocks look similar. Native sulfur occurs in volcanic regions and evaporite deposits worldwide.
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