A family owned business of landscape supplies in Lafayette, CA since 1936. We pride ourselves on is fast, easy delivery of our landscaping supplies. Depending on the project, we are often able to provide next day service on many of our products. For all our delivery prices, please call we would love to help you. PRODUCTS: Sand & Concrete Mix, Gravel & Decorative Mix, Brick & Block, Topsoil, Compost & Bark. Diamond K Supply provides the best landscape supplies, materials & service in the industry. We offer a convenient location for you to visit & make material selections and find exactly the right boulder or flagstone. You will be able to choose from the largest selection of landscape materials & supplies. We are open to both Residential and Commercial Wholesale clients, offering delivery to the entire Lamorinda area or feel free to pick up materials in your own vehicle.