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Cochise Stone

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  • Sierra Vista, AZ 85650
  • 520-378-9443

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    Product Descriptions

    Screened Material

    When rock is crushed, it makes a dust or fines product as well as the rock itself. When you by a screened product, it may have as much as 20 to 25 percent crusher fines in it. Customers sometimes refer to this as dirt in there rock. It is NOT DIRT. It is the powder and smaller rock produced that make it through the screening process. This means that if you buy 10 tons of a screened material, it could have as much as 2 to 2.5 tons of fines in it. The softer the rock, the more prevalent the fines will be.

    Minus Material

    The same screening process is used to make minus material. In minus material, the fines can be as much as 75 percent of the material. That means that the crusher fines or small pieces of rock will be a higher percentage. In a 10 ton load, 5 to 7.5 tons of the material may be fines, and the balance will be larger pieces of rock, depending on the size of rock you have chosen. This type of material packs much more than screened rock, and some people think it looks more like a natural desert. It does not drain well and has a tendency to wash if installed in an area that has heavy run off.

    Rip Rap and River Rock

    All the bulk rock products we sell are screened to size. For most of the standard decorative rock this is pretty straight forward. As for the rip rap and Salt River rock, the end product changes dramatically. When you have a screen size of 2 to 6 inches, what will pass through a 6 inch square hole could be eight inches across and sometimes up to 12 to 18 inches in length. Do not assume when you order 3” to 6” rip rap or salt river rock, the rock pieces will be 3” to 6”. If the screen size is a 6” square hole, and the rock will fall through it, it falls into the size range that is stated. Make sure that you look at the products in our sample area prior to purchasing so there is no confusion about what you are receiving.

    Top Soil

    We have people ask about our topsoil as it seems sandy and not what most people are used too. as we dont experience the natural process of nature creating natural mulch, the topsoil we sell comes from the river bed and is natural occuring, with low salt and clay content, as well as weed free. It is a good base to grow plants except cactus, but most people add mulch or a supplement to it to create a better growing medium. We do offer 3 way mix which has mulch added to it.

    Weed Block

    We do offer weed block for under rock to help with weed control. It is not weed stop, and to make it more effective, you must make sure the area is weed free and pretreat prior to install. Because of the area we live in, there will be dirt and debris blow in that will still allow plants to grow on top of the week block. It still requires maintanence.

    Serving Sierra Vista, Phoenix, and Flagstaff for over 40 years

    You'll appreciate the products and services from our locally owned and operated business that's been serving the area since 1981. Call for your FREE estimate today!

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