mineral
Iron-stained quartz crystal cluster
Quartz (SiO₂), likely iron-oxide-stained; exact variety uncertain
AI-generated identification · may be incorrectQuartz has Mohs hardness 7, a vitreous luster, and a trigonal crystal structure; it lacks cleavage and breaks with conchoidal fracture. The specimen shows pale translucent quartz with rusty orange-brown staining, likely from iron oxides.
Identified More mineral →
Explore Iron-stained quartz crystal cluster in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Quartz has Mohs hardness 7, a vitreous luster, and a trigonal crystal structure; it lacks cleavage and breaks with conchoidal fracture. The specimen shows pale translucent quartz with rusty orange-brown staining, likely from iron oxides.
Formation & geological history
Quartz crystals grow as silica-rich fluids cool in cavities or fractures; iron oxides can stain crystal surfaces or infiltrate cracks. Quartz forms in rocks of many ages, so the specimen’s age and precise origin cannot be determined from the image.
Uses & applications
Quartz is widely used in glass, electronics, and ornamental objects; attractive clusters are collected or displayed.
Geological facts
Quartz commonly forms six-sided prisms with pointed terminations, though this cluster’s crystal faces are irregular and partly obscured.
Field identification & locations
Look for glassy luster, hardness sufficient to scratch glass, and no cleavage; iron staining alone does not establish a specific locality. Common worldwide in veins and cavities of igneous and metamorphic rocks.
