Basalt Stone
A dense, dark volcanic rock valued for paving, tiles and cobbles in modern and traditional outdoor design.
What is Basalt?
Basalt is a fine-grained igneous (volcanic) rock formed from rapidly cooled lava. It is part of the same volcanic family as andesite and much of what is sold as bluestone. Basalt is dense, hard and low in porosity, which makes it excellent for exterior paving and floor tiles. In the stone trade, dark grey and black volcanic basins are commonly referred to as bluestone, and Chinese basalt (often labeled Hainan bluestone or Zhangpu black) is widely exported.
Appearance and finishing
Basalt is typically dark grey to black with a very fine, even grain and small natural pores. It is available with finishes suited to different uses: natural split and flamed for rough, non-slip outdoor pavers; honed for a smooth matte floor tile; and polished for interior tiles and countertops. Bush-hammered and brushed finishes add grip and texture.
Applications
Basalt is most often used for outdoor paving and floor tiles, cobblestones and cube stones (a classic basalt application), driveways, patios and walkways, stepping stones, pool copings, dark interior floor tiles, and occasionally countertops. Its dark color and durability make it a staple for both modern minimalist and heritage-style landscapes.