Quartz Pebble
Quartz (Silicon Dioxide) · Mineral Specimen / Common Stone
Crystal System
Trigonal, massive or water-worn pebble habit
Mineral Group
Silicates (Tectosilicates)
Chemical Formula
SiO2
Formation Process
Formed through various geological processes (igneous, metamorphic, sedimentary) and subsequently weathered, transported, and rounded by water action in sedimentary environments
About This Crystal
An opaque to translucent, water-worn pebble with a brownish-tan or beige outer coloration showing signs of weathering, minor surface pitting, and micro-fractures
Physical Characteristics
Color ranges from white to beige and light brown; streak is white; no distinct cleavage; fracture is conchoidal; specific gravity is approximately 2.65; brittle tenacity; non-magnetic
Optical Properties
Singly or doubly refractive depending on crystalline orientation, uniaxial positive with low birefringence, vitreous to dull luster on weathered surfaces
Hardness & Durability
Origin Region
Found globally in alluvial deposits, riverbeds, and beaches
Hardness & Durability
Mohs hardness of 7; good durability and resistance to scratching, though water-worn specimens lack sharp crystal edges and may have internal micro-fractures from transport
Care & Maintenance
Safe to clean with warm soapy water; highly resistant to most household chemicals; store away from softer stones that it might scratch
Rarity & Value
Extremely common worldwide; low commercial value, primarily collected as a common mineral specimen or tumbling rough
Special Characteristics
Displays natural weathering, rounding from alluvial transport, and iron oxide staining on the exterior surface
Lore & History
Commonly used in ancient times for stone tools and simple talismans; in modern metaphysical practices, clear and milky quartz varieties are considered master healers, though weathered river stones are often associated with grounding, patience, and the steady, enduring energy of flowing water