Antique Black Slate tumbled flagstone

Antique Black Slate is a stone that never looks quite the same twice. Depending on water and lighting, it can show a shimmering silver or a dark charcoal. Slate is a fine-grained stone that splits into thin, flat layers, so it lays well as flagstone. Our Antique Black Slate is tumbled, which means the edges have been smoothed and rounded in a machine. That makes it comfortable wherever hands and bare feet touch the edge.

A stone that shifts with the light

The color range runs from silver to charcoal, and the same piece can move between them as the day goes on. Water changes the color too.

If you like the wet color best, a color-enhancing sealer can hold it. Our wet look vs natural article explains the choice.

Why tumbled edges matter

Tumbled flagstone is turned in a machine until the sharp edges wear smooth. The result has a softer, aged look.

Those rounded edges are why tumbled stone is used for pool coping, wall tops and seat edges. For a pool, tell staff about your water so they can confirm the stone suits the spot. Our pool coping ideas page has more on planning.

Planning your project

Measure the area with a tape and bring the numbers, along with a photo of your house. Staff can help you plan quantity, and the flagstone calculator gives a starting estimate.

Stone is sold by weight and quoted by phone or at the yard. For a large job, talk through the whole project at once so the pieces come from matching stock.

Popular uses

• Pool coping
• Wall caps
• Seat wall edges
• Patios with a dark tone
• Garden steps