mineral

Iron-stained quartz vein rock

Predominantly quartz (SiO₂), with iron oxides/hydroxides such as goethite or limonite

AI-generated identification · may be incorrect

Mostly white to translucent quartz with rusty brown staining and an irregular, massive texture; vitreous to dull luster, no obvious cleavage, Mohs hardness about 7, and specific gravity near 2.65. The image does not show enough detail to confirm minor minerals or texture.

Identified October 15, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed when silica-rich fluids filled fractures and crystallized as a quartz vein; later oxidation of iron-bearing minerals produced the brown staining. The vein’s age cannot be determined from the image.

Uses & applications

Quartz veins are collected as specimens and may be sources of silica; attractive material can be cut or polished, though this piece appears rough and iron-stained.

Geological facts

Quartz is among Earth’s most abundant minerals and resists weathering, so veins commonly remain exposed after surrounding rock erodes.

Field identification & locations

Look for glassy or translucent white areas, hardness sufficient to scratch glass, and rusty staining along fractures. Quartz veins occur in many rock types worldwide; value depends on size, quality, and locality.