Rock Identifier
Landscaping Gravel / River Rock (Polymictic Gravel Aggregates) — sedimentary
sedimentary

Landscaping Gravel / River Rock

Polymictic Gravel Aggregates

AI-generated identification · may be incorrect

Hardness varies from 6 to 7 on the Mohs scale depending on the mineral makeup. Colors are mixed, including white, gray, tan, brown, and pink. Luster is dull to vitreous with a rounded, smooth to sub-angular texture.

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Physical properties

Hardness varies from 6 to 7 on the Mohs scale depending on the mineral makeup. Colors are mixed, including white, gray, tan, brown, and pink. Luster is dull to vitreous with a rounded, smooth to sub-angular texture.

Formation & geological history

Formed through the mechanical weathering, erosion, and water-transport of various parent rocks in riverbeds or glacial deposits, later sorted for commercial use.

Uses & applications

Widely used in residential landscaping, drainage beds, pathways, and construction aggregates.

Geological facts

These aggregates are a mix of durable rock types like quartz, granite, and quartzite, chosen for their resistance to weathering.

Field identification & locations

Identified by a mixture of rounded, multicolored stone fragments commonly sold in bulk for ground cover.

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