Common Quartz Pebble
Quartz (Silicon Dioxide) · Mineral Specimen
Crystal System
Trigonal, massive or rounded water-worn pebble habit
Mineral Group
Silicates (Tectosilicates)
Chemical Formula
SiO2
Formation Process
Sedimentary transport and mechanical weathering (abrasion of parent quartz rock in a high-energy aquatic environment)
About This Crystal
An opaque to translucent, rounded, weathered pebble with a dull to vitreous luster, showing minor surface pitting, dirt, and micro-fractures typical of alluvial transport.
Physical Characteristics
Color ranges from off-white to greyish-tan with earthy surface staining; white streak; conchoidal fracture; no true cleavage; specific gravity is approximately 2.65.
Optical Properties
Uniaxial positive, doubly refractive with low birefringence.
Hardness & Durability
Origin Region
Found worldwide in riverbeds, glacial deposits, and beaches; this specific specimen is a water-worn rock fragment.
Hardness & Durability
Mohs hardness of 7; high toughness and chemical stability, highly resistant to weathering.
Care & Maintenance
Washable with warm soapy water; highly durable and resistant to most chemicals except hydrofluoric acid.
Rarity & Value
Extremely common; low commercial value, primarily valued as a geological specimen or decorative landscaping stone.
Special Characteristics
Displays typical mechanical weathering features such as impact marks and abrasion pitting.
Lore & History
Quartz pebbles have been used historically by ancient humans for tools, fire-starting, and ritual purposes. In modern crystal healing, quartz is considered a master healer and amplifier of energy, though this is traditional lore without scientific backing.