Sandstone
Sedimentary Rock / Quartz Arenite · Mineral Specimen / Sedimentary Rock
Crystal System
Trigonal (individual quartz grains)
Mineral Group
Silicates (Tectosilicate framework)
Chemical Formula
SiO2 (primarily quartz grains with variable mineral cement)
Formation Process
Sedimentary accumulation of mineral particles or rock fragments, followed by compaction and cementation (lithification) over millions of years
About This Crystal
A fine- to medium-grained sedimentary rock composed mainly of quartz sand, exhibiting a weathered, rounded exterior surface nestled amongst grass and soil, with a granular texture and earthy brownish-gray coloring
Physical Characteristics
Light brown to gray body color, white streak, massive or granular habit, no distinct cleavage, uneven to splintery fracture, specific gravity around 2.2 to 2.8, brittle tenacity, generally inert to magnetism and fluorescence
Optical Properties
Translucent to opaque aggregate, vitreous luster on individual quartz grain surfaces but dull earthy overall, doubly refractive under microscopic examination of constituent grains
Hardness & Durability
Origin Region
Worldwide distribution, commonly found in desert, river, and beach geological environments
Hardness & Durability
Mohs hardness typically 6 to 7 (due to quartz composition), moderate toughness depending on cementation, highly stable under normal environmental conditions, though weathered surfaces can be friable
Care & Maintenance
Wash gently with warm soapy water and a soft brush, store safely, highly resistant to environmental degradation and sunlight fading
Rarity & Value
Extremely common worldwide, minimal monetary value as a raw specimen, widely used as an industrial and construction material
Special Characteristics
May contain fossil fragments, ripple marks, cross-bedding, or various mineral inclusions depending on the depositional environment
Lore & History
Historically used extensively in ancient architecture, monuments, and masonry worldwide; in metaphysical lore, sandstone is traditionally associated with creativity, clarity, and grounding energy, though these are cultural beliefs rather than scientific properties