Our frequently-asked-questions are broken into five categories to assist you.


Yes! Please visit one of our six Southern California locations and hand-select your stone. Our customer service representatives will help you tag your material for delivery and answer all of your questions.

All stores carry our most popular products, but since we have over 5,000 items they are not always in stock at every location. If you want something specific or if you don’t see the material you are looking for, chances are we can order it for you.

Yes, we have both. Sales and clearance items are store-specific and are posted monthly on our Promotions page.

Because most of our materials are a product of nature, we include the following disclaimer on all sales: All stone is a product of nature and cannot be guaranteed for color, shape, uniformity, or tendency to fracture. The variation of color, shape and texture is inherent to and an integral part of the characteristics of natural stone. Installers should be aware of and discard any irregular or abnormal piece that might be present prior to installation. However, since we believe in the quality of our products, please don’t hesitate to get in touch with us if something is wrong with your purchase. We will always do our absolute best to please our customers so they enjoy success with their projects.

Southwest Boulder & Stone weighs every product before it is sold, ensuring that you are only paying for what you actually receive. We try to as exact as possible, but with bulk material there is some estimating; for example you may order 25 tons but receive 23.7 or 25.9 tons. We use county-certified scales to guarantee you will only be charged for the exact amount delivered.

When you see a product that has a minus behind the size like 6"- (minus), it means that all rock larger than 6" will have been removed while anything smaller than 6" is left behind and is what you will get. If you want nothing but the crushed rock with no smaller particles, request the screened rock. Most DG is a 3/8"- material meaning it may range from 3/8" rock down to very fine particles (like sand size).

You can purchase any amount you need; there is no minimum purchase. If you only need a small amount, we sell most products in our ½ CF bags which weigh approximately 40lbs. If you are paying for a delivery, plan ahead to purchase all your products at one time to consolidate delivery.

Sometimes it’s more accurate to sell by the weight than by the yard. Products that are very light such as wood mulches and compost are sold by the cubic yard (CY). Stone is heavy and is sold by the pound or ton (2000 lbs.)


Southwest Boulder & Stone is primarily a supplier and deliverer of landscape products, and does not provide contractors or installation. Our retail counter staff is always happy to help recommend contractors in your area; however, Southwest Boulder & Stone is not officially affiliated or aligned with any landscape contractors.

Southwest Boulder & Stone can place your boulders in desired locations with an added Crane Placement charge; the delivery site will need to be checked for telephone poles/wires, trees, crane reach, and any other obstacle that may prevent crane placement.

Yes, there is a 1 ton minimum order for delivery. If the material quantity is less than 1 ton, our yard staff will load the material into your vehicle and answer any questions you might have. 

Southwest Boulder & Stone is more than happy to accommodate any special requests that are discussed prior to delivery. Trucks are allowed 15 minutes to off-load before stand-by charges begin to accrue so it is very important to discuss special needs or requests when placing your order. Customers are required to sign a release of liability prior to our offloading onto private property.

Delivering inside a gated community is not a problem; we simply ask that you inform the gate keeper or provide us with an access code prior to the day of delivery. Any standby time accrued while waiting for access into community will be charged to the customer.

Any deliveries that are canceled less than 24 hours in advance will lose the initial deposit taken at the time the order was placed. Our delivery vehicles are preloaded with your material the day prior to your delivery, so as much advance notification as possible is greatly appreciated.

Crane offload is simply delivering the boulders directly to your home or jobsite and offloading several boulders at once in one spot.
Crane placement occurs when we place and position the boulders exactly where you request, one boulder at a time.

Southwest Boulder & Stone has a fleet of trucks and cranes used for each delivery. Check out our delivery options for more details on our fleet. Should you have any questions feel free to contact any Southwest Boulder rep for more information.

Once your order is placed, the Southwest Boulder & Stone dispatch department will call you with a delivery date and a 3-hour arrival window. Generally, for in-stock products, we estimate delivery to occur within 3-5 days after the order is placed. Delivery of special order products will be estimated and communicated when the order is placed.


Options include color, type of pieces (patio or select), thickness (¾” up to 4”), and texture (smooth, rippled, clefted, tumbled).

Patio indicates smaller diameter “stepping stone” type pieces while Select or Stand-Up indicates larger pieces. Select pieces are generally more expensive because they are harder to produce. It’s more difficult to split a large piece of stone without breaking it into smaller pieces.

Use the thinner flagstone when you have an existing subsurface like a concrete floor or a CMU block wall. Use thicker pieces when you dry-set or sand-set the flagstone over dirt.

Decomposed Granite

Southwest Boulder & Stone carries 10 different colors of decomposed granite. Visit our DG products section for pictures, visit one of our rock yards in person or call to request a sample.

If you want a more structured surface for your pathway or backyard, you can add a soil binder to the decomposed granite (DG) base. We carry both an organic, powdered binder, Soil Secure, and an inorganic liquid binder, Marloc. Both will stabilize your DG when wetted and compacted and can be done fairly easily as a DIY project (here's our guide on how to install a DG pathway). However, for the best results, we recommend using a licensed contractor for any larger installation.

Industry norm for DG coverage is about one ton for every 100 square feet at a 2" depth, compacted. We recommend installing 2" depth of DG for pathways and 4" for driveways. Check out our DIY step by step tutorial on decomposed granite paths for more info. 

Decomposed Granite (DG) is granitic rock that has decomposed (crumbled) into small particles of soft rock-gravel, sand, and silt-sized particles with some clay. It makes a great natural surface for pathways or driveways. Stabilized DG has a stabilizer like Marloc pre-mixed into the material, making it less likely to move over time and better in high wind areas.


When deciding whether to use Natural Thin Veneer (NTV) or Manufactured stone, consider material cost, installation cost, finished look and longevity.

Natural Thin Veneer was introduced as an alternative to the heavier natural four-inch thick full bed-depth building stone. The lighter manufactured stone was easier to install than full-bed depth stone veneer, and thus the natural stone market was compelled to produce a lighter similar product through the sawing of natural stone. Manufactured stone is comprised of concrete molded into patterns and then colored like real stone, and suppliers assert that their product is superior in color consistency, availability, and ease of installation. This is true of higher-end manufactured stone, which more closely resembles natural stone, but it is similar in price to real stone. Installation procedures and costs are roughly the same for both products. However, because it is actual stone, both color and longevity of NTV are unequaled by manufactured stone.

Concrete Sand is a coarse sand with larger particles. This type of sand is typically used in concrete but can also be used as pipe sand or as a base layer and leveling medium for above ground pools, and patios or walkways made of concrete paving stones.

Plaster Sand is a finer grade sand with smaller particles. It’s often mixed with water and cement to make mortar for laying bricks/blocks. It can be used in cement, particularly for projects like swimming pools and concrete paving stones where the finer grain gives a more finished appearance. Its finer texture also makes it an acceptable replacement for beach sand in applications like sand volleyball courts.

Fill Sand is a non-processed sand. Product size ranges from occasional 2" rock down to 15% silt and clay. This product is excellent for fill under slabs, fill behind retaining walls and trench fill applications that do not require any particular particle size gradation.

Infill Sand is used in artificial grass as a stable base to hold the blades upright and to retain a springy feeling. Typically colored green, it is spread between one-eighth and one-quarter inch deep within the grass blades, and allows the artificial turf to remain functional and aesthetically pleasing.

Ashlar (Block): Ashlar-shaped stones are roughly square and rectangular in shape. Ashlar-shaped stone can be installed as a dry-stack, with standard mortar joints or overgrouted mortar joints.

Ledge: Ledge stones are generally wider than they are high. Ledge stones can be installed as a dry-stack, standard mortar joint or an overgrouted mortar joint.

Fieldstone: Fieldstone is a random mix of differently shaped stones and sizes. Fieldstone is usually installed with a standard mortar joint but can be installed with an overgrouted mortar joint too.

Rubble: Rubble is an irregular stone often with some randomly shaped intermixed “jumpers”. Rubble can be installed with a standard mortar joint but can also be installed with an overgrouted mortar joint too.

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