mineral
Iron-stained quartz (probable quartz vein fragment)
Quartz, SiO₂, with iron-oxide staining
AI-generated identification · may be incorrectWhite to translucent gray quartz with reddish-brown hematite/goethite staining; vitreous luster, irregular fracture, no obvious cleavage, Mohs hardness 7, specific gravity about 2.65. The image is low-resolution, so identification is provisional.
Identified More mineral →
Explore Iron-stained quartz (probable quartz vein fragment) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
White to translucent gray quartz with reddish-brown hematite/goethite staining; vitreous luster, irregular fracture, no obvious cleavage, Mohs hardness 7, specific gravity about 2.65. The image is low-resolution, so identification is provisional.
Formation & geological history
Likely formed when silica-rich fluids filled fractures in host rock, later acquiring iron staining through weathering; quartz veins range from ancient Precambrian to geologically recent. It may also be a small weathered fragment of quartz-bearing rock.
Uses & applications
Common quartz is used in glass, ceramics, abrasives, electronics, and construction aggregate; attractive pieces are collected but usually have little gem value.
Geological facts
Quartz is one of Earth’s most abundant minerals and is chemically resistant, often surviving after softer surrounding minerals weather away.
Field identification & locations
Check for glassy luster, sharp edges, and ability to scratch ordinary glass; iron staining is not diagnostic. Common worldwide, especially in quartz veins and hydrothermal districts.
