mineral

Small iron-stained quartz-rich rock fragment

Likely quartz (SiO₂) with iron-oxide staining; exact identification is uncertain from the image

AI-generated identification · may be incorrect

Cream to pale tan, irregular and slightly sparkly surface; likely vitreous quartz grains with rusty staining. Quartz is Mohs 7, trigonal, with no cleavage and conchoidal fracture; the specimen’s hardness cannot be confirmed visually.

Identified October 6, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly forms as veins or crystals in igneous and metamorphic rocks, or as grains in sedimentary rocks; iron oxides can stain it during weathering. Its age and specific formation environment cannot be determined from the photo.

Uses & applications

Quartz is widely used in glass, electronics, abrasives, and jewelry; this tiny fragment has little practical use unless it proves to be a distinctive collectible specimen.

Geological facts

Quartz is one of Earth’s most abundant minerals and occurs in many rock types.

Field identification & locations

Look for glassy sparkle, hardness sufficient to scratch glass, and lack of cleavage; a closer view or simple hardness and streak tests would help distinguish it from other pale minerals. Quartz occurs worldwide.