Thunderflash is one of Antolini's signature green quartzites, named for the way its red-iron veining cracks across the seafoam ground like lightning. The field on this slab reads pale jade to soft mint, glassy and cool, and the veining strikes in long diagonal runs of garnet, oxblood, and copper, with finer white quartz fissures threading the background. Brazilian in origin, fully natural, hard-wearing, and unmistakable.

This slab is 2cm gauge, polished, measuring 76″ × 129″ — large enough for an island top, a feature wall, or a bookmatched vanity pair. Polished is the right call on Thunderflash: it deepens the green, lights the red veining, and pulls the chroma forward where honed reads softer and chalkier.

Pairs with unlacquered brass and aged bronze that echo the rust veining, with rift white oak and walnut cabinetry, and with warm plaster walls in a clay or bone register. Part of a new container of Antolini slabs landed this week alongside the honed sister piece.

On the floor at 2303 South Sepulveda. Walk it in daylight to read the veining honestly, and tag the slab for your project.