3-6" Rainbow Cobble
Description
3–6″ Rainbow Cobble is a great choice for decorative accent beds, dry creek beds, and water feature borders because of its smooth, naturally tumbled shape and exceptionally varied color palette. It's also an excellent choice for residential and commercial xeriscaping projects. With its striking blend of cream, sage-gray, mauve-purple, and rust-orange tones, this stone brings a truly multi-colored, eye-catching character to any landscape. Whether used as a decorative ground cover, a water feature accent, or a garden border, 3″–6″ Rainbow Cobble delivers exceptional color variety and lasting performance in virtually any application.
Quick specs
Available at Our Salt Lake County Landscape Center
This material is stocked in bulk at our Salt Lake County landscape center and is available for both pickup and delivery throughout the surrounding Utah areas. Customers are welcome to stop by and view the gravel in person, making it easier to compare size, color, and texture before placing an order.
Bulk Supply
We stock our landscape center with clearly marked bins so every product is easy to find and readily available.
Loaded by Equipment
Our team can quickly load larger quantities using skid steer loaders for fast and efficient pickup.
See it in Person
Stop by and get a feel for the material firsthand — no surprises when it arrives.
Available at This Location
Free Samples
Take home a free sample to make sure this material is the right fit for your project.
Pickup
We load trucks and trailers on-site using loaders, with no minimum purchase required.
Delivery
We offer delivery for orders of all sizes, from small quantities to large bulk loads.
Bagging
Bagging is available for pickup and delivery orders at an additional cost.
Live Support
Visit us in person or call or text our team with any questions—we’re here to help.
Installation Depth Guide — Cubic Yard Coverage for 3″–6″ Rainbow Cobble
| Depth | Coverage per Cubic Yard | Recommendation |
|---|---|---|
| 3″ | ~100 sq ft | Too shallow |
| 4″ | ~80 sq ft | Not recommended |
| 5″ | ~70 sq ft | Minimum depth |
| 5.5″ | ~60 sq ft | Recommended |
| 6″ | ~55 sq ft | Ideal depth |
| 7″ | ~50 sq ft | Usually unnecessary |
| 8″ | ~45 sq ft | Excessive |
Note: Because individual stones can measure up to 6″, a typical installation depth is 5-6 inches for this rock — enough to fully bed the largest pieces. Installing shallower than 5 inches will leave larger stones sitting loosely on top of the base rather than nested in, which can cause shifting. Some pieces may fall outside the stated range as part of the natural mix. When in doubt, test a small section first.
Product details, what you should know
- Sizing: Mixed cobble ranging from 3" to 6", giving a natural, varied look rather than a uniform single size. Some pieces may fall outside this range as part of the natural mix.
- Cleanliness: Washed, smooth river-tumbled material with minimal fines.
- Appearance: Smooth, rounded stone featuring an unusually wide color range — cream, sage-gray, mauve-purple, and rust-orange pieces all mixed together for a true multi-tonal, "rainbow" look. Colors deepen and take on a glossy, polished look when wet. Color may vary slightly between loads.
- History: Material has remained generally consistent in size range and color over time. The cream, sage-gray, mauve-purple, and rust-orange blend is typical of this stone, with minor variation between loads as expected with any natural river-tumbled material. Colors tend to appear more muted and matte when dry and become noticeably richer and glossier when wet.
- Also known as: Commonly referred to as multi-color river rock, mixed tumbled cobble, or rainbow river stone.
Rainbow Cobble stands out for having the widest color range in our tumbled lineup — cream, gray, purple, and rust tones all in a single load — making it a favorite for accent beds and water features where visual variety is the goal rather than a single dominant color. Its rounded, tumbled shape means it's not recommended for driveways or high-traffic surfaces; it's best suited as a decorative element. Worth noting — all of these tones deepen and become glossier when wet, so the color contrast is even more dramatic after rain.
- Stock: In Stock
- Unit: Cubic Yard
- Weight: 2,500.00lb
- SKU: RKN-285-0001
- Bin Location: B6