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More rocks. I like the colors!
Reddish rocks. Sandstone?
PA Boulders
It's rocks!
Boulders. I want boulders, but how many and what size? How do they even lift these things? This one looks like it would crumble anyway.
Rustic Boulders  (as opposed to Cosmopolitan Boulders)
Bull Run Veneer, which sparkles in the sun and makes a wonderful scraping sound, like the opening of a cursed tomb
Tri State Stone Building Materials & Supply

Tri State Stone Co. has been family owned and operated since 1926. The quarries flagship product is Carderock Stone. This beautiful building stone is a mica-schist quartzite, with horizontal and vertical cleavage making it easy to work into numerous installation styles.

Website: carderock.com

Phone: (301) 365-2100

Closed now

  • Wed 7:30 AM - 4:00 PM

8200 Seven Locks Rd Bethesda, MD 20817 ·141.83 mi

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Reviews

yelp
3.5 20 reviews
5 star
8 4 star
6 3 star
0 2 star
1 1 star
5
J. S. 05/01/21

Now that I have this quarry business DOWN, I went back to get more stone. My amazing project guy said to get a Supersack of the Delaware River Stone, 1-3. Called up Tri-State, and the guy on...

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Kristen S. 04/01/21

Great service and the best prices in the area! Will update review once items ordered are in and contractor picks them up.

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Ann C. 09/28/18

Local quarry that maintains a good selection of stones and provides generally good and attentive service even if you just drop in randomly with questions. Good supplier if Carderock Rock, a...

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Wayne L. 04/25/15

A cool stone yard that has tons of materials on site. To get to the sales office you need to drive down the hill to a trailer. The staff here is super helpful and talked us through all the options...

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Nini A. 05/09/12

This is definitely a place that contractors, masons and those in the industry frequent and can maneuver around without a thought. With that being said, my husband sent me out her to purchase a...

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