Aggregates & Organics

For more than 30 years, customers have counted on Onyx to produce quality material at competitive prices. With extensive experience in residential landscapes and civil infrastructure, we have a complete understanding of the material needs for your project. We’ll work with you to evaluate your site and ensure that the materials you choose are best suited for the intent.

For many of our clients, going beyond the standard list of materials may be necessary. That’s why we offer custom blends to meet your specific needs. We test all of our materials to ensure that they meet top industry standards. To ensure your complete satisfaction, we offer outside testing services that certify the exact specifications for your job are met.

Whether you’re a builder searching for material, an architect meeting the needs of a client, or a municipality completing a large-scale public works project, we’re as committed as you are to your success and ensuring the right materials are available when you need them.

Learn more about what we offer at our Acton, Leominster, and Sterling locations, and place your order or send us an email:


7 Chocksett Rd, Sterling, MA


Littleton, MA


Jungle Rd, Leominster, MA


18 Wetherbee St, Acton, MA
Our process

See our team at work at Sterling Pit

We’re proud of the reputation we’ve earned through years of collaborating with renowned custom home builders and architects to build luxury landscapes. Our relationships with landscape architects in the area mean everything to us and the work we do. A crucial part of a successful project is making sure you have the right team from the start.


We’re proud to operate and offer a wide variety of material from locations throughout Massachusetts. Here is our full list of materials offered.

To get in contact with us, please email
Homeowners should begin by discussing their ideas with Onyx, leveraging our deep knowledge of the field and our industry contacts; Onyx works with a select group of landscape architects and can offer guidance on finding the right fit for your vision.
Once a schematic design is complete, Onyx works with homeowners to meet with contractors, compare options and review details. Onyx then collaborates with you, the landscape architect and our preferred vendors to value engineer our design and provide final pricing that aligns with your budget. Our team will then spearhead the engineering and permitting process in order to secure required permits.
Permits in hand, we can mobilize and excavation can begin. Onyx will guide you step-by-step through the landscape construction process—ranging from gunite pools and plumbing to patios, lawn and lighting, and then to the fun, final step, enjoying your outdoor space!
During this process, Onyx’s full-service team will be onsite, building the landscape of your dreams; including fire features, outdoor kitchens, walkways, retaining walls and plantings. Bringing these elements to fruition can occur simultaneously, and having the right team in place is essential for coordination and efficiency.
Now that you are ready to enjoy your new landscape, the last consideration is upkeep. With your new team in place, Onyx will oversee the transition from construction to maintenance. Your landscape will be carefully maintained, ensuring the success and longevity of your own personal paradise.
  • Crushed Stone
  • Dense Graded Base
  • Graded Base
  • Minus Base (Crushed)
  • Processed with Sand (Type B)
  • Processed with Sand (Type C)
  • Graded Base/Sandy Fill
  • Stone Dust
  • 6″ Minus Crushed – Jaw Run
  • Clean Fill
  • Loam Tailings 3″ Minus
  • Loam Tailings 3″ Plus
  • Urban Fill (Contains pipe, brick, etc.)
  • Clay/Pond Silt
  • Fill/Overburden
  • Stump Grindings
  • Wood Chips
  • Aged Dark Bark
  • Hemlock Bark
  • Pine Bark
  • Hemlock Bark
  • Screened Sand/Pipe Bedding
  • 2mm Mason/Golf Topdressing Sand
  • Sandy Silt/Pool Liner Sand
  • Bank Sand
  • Title V Septic Sand
  • Asphalt (Clean)
  • Concrete (Unreinforced)
  • 3/8″ of Screened Loam
  • 3/8″ Screened Planting Mix
  • 3/8″ Screened Turf Mix
  • Unscreened Loam
  • Asphalt Millings
Our Services


Walls & Steps

Add layers and interest to your landscaping and make it feel like an extension of your home. While these features look good, they also retain soil or water so that everything stays exactly where it ought to be through good and bad weather.
Outdoor Kitchens & Fire Pits

On gorgeous evenings, spoil your friends, family, and self with dinner made outdoors and then unwind in front of the fire. We believe places to bring people together are some of the most important features of your landscaping.
Lawns & Meadows

Whether you prefer the clean-cut look of turfgrass, or want a meadow to add biodiversity and reduce your carbon footprint, our team will create a yard you love opening up your windows to every day.
Pools & Features

Nothing invites you to relax like the sound and sight of water. Add some tranquility with an attractive waterfall feature, or become the house all your friends and family want to come to with the stunning inground pool you’ve always dreamed of.

From pathways to driveways, planning to installation, you can count on us for a smooth drive (or a leisurely walk around the garden).

Our horticulture experts go above and beyond for your flowers and greenery. They keep everything flourishing, healthy, and breathtaking for your landscaping. Visit our Horticultural Services to learn more.
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