mineral

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 on Mohs scale; Color: Opaque white to yellowish-orange due to iron oxides; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Opaque white to yellowish-orange due to iron oxides
Luster: Vitreous to greasy

Identified March 7, 2026More mineral →

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Physical properties

Formation & geological history

Formed from silica-rich hydrothermal veins or within igneous pegmatites. The white color comes from microscopic fluid inclusions trapped during crystallization. The orange staining is secondary oxidation of iron minerals. Can range from Precambrian to recent ages.

Uses & applications

Used in the production of glass, ceramics, and abrasives. Large, high-purity deposits are used in electronics. Lower-grade specimens are used as garden stones, construction aggregate, or tumbled for low-cost jewelry/collecting.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is the most common variety. The orange 'staining' seen here is often referred to by collectors as 'Golden Healer' if the color is deeply saturated throughout.

Field identification & locations

Identify in the field by its hardness (it will scratch glass and steel), lack of cleavage, and waxy/milky appearance. Commonly found in riverbeds, mountain outcrops, and glacial till. Collectors look for unique banding or internal structures.

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