mineral
Quartz Geode Cluster (Iron-stained Quartz)
Silicon Dioxide (SiO2)
Hardness of 7 on Mohs scale. Color ranges from clear/milky white to yellow-orange or reddish-brown due to iron oxide staining. Luster is vitreous to resinous. Hexagonal crystal system with trigonal terminations. No cleavage, exhibits conchoidal fracture.
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Physical properties
Hardness of 7 on Mohs scale. Color ranges from clear/milky white to yellow-orange or reddish-brown due to iron oxide staining. Luster is vitreous to resinous. Hexagonal crystal system with trigonal terminations. No cleavage, exhibits conchoidal fracture.
Formation & geological history
Formed in cavities within sedimentary rocks or volcanic geodes through hydrothermal activity where silica-rich fluids precipitated quartz crystals over millions of years. Iron oxide impurities deposited on the surface give it a golden-tan or rusty orange hue.
Uses & applications
Popular as display specimens for rock collectors, lapidary projects, metaphysical/meditation stones, and home decor items.
Geological facts
Quartz is one of the most abundant minerals in Earth's continental crust. Iron-stained quartz clusters are often called 'Golden Healer' in metaphysical communities or 'creedite-like' due to color, though chemically it is pure quartz coated with hematite or goethite.
Field identification & locations
Can be identified in the field by its six-sided pointed crystal terminations, hardness (scratches glass readily), and golden-brown iron staining inside the cavity. Commonly found in geode beds across Brazil, Uruguay, Morocco, and various US locations like Iowa and Missouri.
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