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I have this around my yard between larger concrete stepping stones and in more open locations. It is a rough rock with hints of different colors. My guess is some sort of gravel - I'm hoping for something more specific to purchase more.

stone on matt for size

stone in yard

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    Asking a local, or giving approximate location would be helpful. I see what might be granite or quartz, and blue-grey pieces of something else (basalt?). – Polypipe Wrangler Dec 7 '20 at 9:03
  • Located in Southern California. Thanks for the tip on asking local - will reach out to a few places selling landscaping materials. – user33220 Dec 7 '20 at 15:36
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White color makes it very likely to be mostly lime stone. The size looks like limestone "screenings" . When limestone is crushed certain size ranges are used for concrete ; so sizes are separated by screens . The angular shape also indicates a crushed material. This is size is too small for concrete and is essentially a by-product. Smaller "dust" size particles have been washed away. If you only want a few pounds , you can get a similar ( but expensive) product at pet shops as "crushed coral" or aragonite . Aragonite is one of the crystal forms of calcium carbonate.

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    If limestone, should "fizz" when acid added. try vinegar etc. – Polypipe Wrangler Dec 7 '20 at 9:04

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