What's That Rock?Conglomerate
A sedimentary rock made of rounded pebbles and gravel cemented together.
How to identify Conglomerate
- Visible rounded pebbles set in a finer matrix
- Pebbles can be different rock types
- Rough surface
Often confused with
Is Conglomerate valuable?
Common.
What changes the price
- Common rock: low value
- Polished slabs or unusual pebble types (such as puddingstone) can be decorative
- Priced as building and landscape material
Uses
- Building stone, decorative stone
Care
Safe to wash.
Identifying a stone from a description or a photo is an estimate. Many stones look alike. Ask an expert or a gem lab before you buy, sell or rely on an identification.
Updated October 2026