mineral
Milky Quartz Pebble with Iron Inclusions
Crystalline Silicon Dioxide (SiO2)
Hardness: 7 (Mohs scale), Color: White to grey with orange/brown iron staining, Lustre: Vitreous to waxy, Crystal Structure: Trigonal/Hexagonal, Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: White to grey with orange/brown iron staining, Lustre: Vitreous to waxy, Crystal Structure: Trigonal/Hexagonal, Specific Gravity: 2.65
Formation & geological history
Formed in hydrothermal veins or pegmatites; this specimen was subsequently eroded and rounded by water action in a river or glacial environment. Common in the Eastern Alps region where it was found.
Uses & applications
Commonly used as decorative gravel, in landscaping, or as a minor gemstone for tumbling. High-purity quartz is used in electronics and glass manufacturing.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. These specific rounded white pebbles are often called 'river stones' or 'stream bed quartz'.
Field identification & locations
Identified by its white translucency and inability to be scratched by a steel blade. Found extensively in gravel pits and riverbanks across Central Europe, especially near Maribor, Slovenia.
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