Geologically rare, this exotic jet-black quartzite has an unusual, bottomless presence. Composed of fine individual grains of black sandstone washed, compressed and welded together by hundreds of millions of years of heat and pressure, the result is unique and timeless.


Strong and durable, the quartzite withstands heavy weather and heavy foot traffic. Its dense structure flawlessly retains carved details and crisp arises. Even when hand finished, it will not refract light, so tool marks lend texture but minimize color variation. No other building stone has such amazing characteristics.


Like all quartzites, the River Black is inert – it is not affected by chlorine and will not discolor with pollution or acid rain. When wet, the stone has a striking jet-black sheen.  It is often used as a border to highlight other materials, bringing out the depths of fountains and pools. In fact, modern architecture often draws on its pure color to contrast with glass and stainless steel.

Recommended Uses

Pavers, veneer, quoins, coping/caps, curbs, sills/lintels, drain grates, carved objects, columns, sinks/tubs, slabs and cobblestones


River Black Quartzite may be installed in all standard setting techniques – mortar or thinset on slab or by sand setting.

Min thickness 0.75" / 20mm
Min thickness 0.75" / 20mm
Sand Rubbed
Min thickness 0.75" / 20mm
Bush Hammer
Min thickness 1.5" / 38mm
Min thickness 2.5" / 64mm
2 Point Stalk
Min thickness 1.5" / 38mm
Min thickness 3" / 75mm
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River Black Quartzite
River Black Quartzite
River Black Quartzite
River Black Quartzite
River Black Quartzite
River Black Quartzite

Material Specifications and Technical Data

Get access to material specifications and ASTM technical data for River Black Quartzite by viewing the tables below or downloading the brochure.




As you'd expect in a natural product, stone does vary in colour and texture, even in the same quarry block. That's what makes stone so unique.
We recommend using the images on our website to initially chose the colour, texture and look you prefer, then talk to us to see our current samples. Mockups are also a great option before making your final decision. We strive to provide a product of the highest quality, but please remember it's stone, not paint. The colour and texture of the next layer in the quarry was defined millions of years ago.

106 NW 36th Street

Seattle, WA 98107, USA

+1 206 709 3000

Rhodes USA
Rhodes Australia

Building 5, 650 Church Street

Cremorne VIC 3121

1300 856 222

Rhodes China

Room 1023

Buynow Technology Building

No. 76 Hubin Nan Lu

Xiamen 361004

Fujian, China 

+86 592 533 0273

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