igneous, sedimentary, and metamorphic
Mixed Rock Collection (Pebbles and Stones)
Various geological specimens
AI-generated identification · may be incorrectMohs hardness varies from 3 to 7 depending on the specific stone; colors range from gray, brown, pink, to multi-colored; luster varies from dull to vitreous
Identified More igneous, sedimentary, and metamorphic →
Explore Mixed Rock Collection (Pebbles and Stones) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Mohs hardness varies from 3 to 7 depending on the specific stone; colors range from gray, brown, pink, to multi-colored; luster varies from dull to vitreous
Formation & geological history
Formed through various geological processes including igneous crystallization, sedimentary deposition, and metamorphic transformation over millions of years
Uses & applications
Used for landscaping, decorative purposes, rock tumbling, and educational collections
Geological facts
This collection displays a variety of rock types scattered on a wooden surface, showing different weathering patterns and mineral compositions
Field identification & locations
Commonly found in riverbeds, glacial tills, and beaches worldwide; excellent for beginner geology studies
More like this
Other igneous, sedimentary, and metamorphic specimens
Natural freshwater pearls
Pearl (nacreous calcium carbonate; chiefly aragonite, CaCO₃)
gemstone
Milky quartz crystal cluster
Quartz (silicon dioxide, SiO₂)
mineral
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Yellow chalcedony or quartz fragment
Microcrystalline quartz, SiO₂ (tentative; possibly iron-stained chalcedony)
mineral
Polished fossil coral
Fossilized coral, commonly agatized coral (silica replacing CaCO₃)
fossil