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Featured Products
- These are popular products that fit into a wide variety or projects. Follow the thumbnails to see more images of each stone.
- Tumbled Frontier Wall Stones Glen Rose Limestone
- Flatwillow Thin Veneer Prairie Fieldstone
- Frontier Sawn Pattern Montana Moss Rock
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Select Stone Quarries
Frontier Sandstone Quarry

The Frontier Sandstone is a hard gray, tan and brown sandstone quarried in central Montana. The images below show parts of the quarrying process.
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Frontier Sandstone is quarried in the plains of central Montana.

Slabs of Frontier are removed with excavators.

Slabs are split down to thickness.

Flagstone is sorted by thickness and palletized.

Good flagstone does not have any seams in it.

Some slabs are sawn into rectangular paving.

Finished sawn-edge paving.

Many Frontier products are cut to size on hydraulic stone splitters.

Stone splitters cut pieces to size.

Large tumblers are used to handle thicker material.

Thinner material is tumbled in vibrating beds of gravel.

A thin veneer saw is used to cut stone into natural thin veneer.
Chief Cliff Quarry

Chief Cliff is a flinty hard argyllite/quartzite that crops out in many places in northwestern Montana. The images below show typical quarrying methods.
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The Chief Cliff quarry

Chief Cliff is quarried from dipping layers of stone.

Chief Cliff is processed through a stone splitter.

Finished Chief Cliff pallets.