Slateofchina offer craft slate:flowerpot, stone flowerpot, slate flowerpot.
Resistance to Acid and Pollutants
Custom-built sizs.
flowerpot:
Cubic flowerpot was maded up by 5pieces slate. Two length slate:300*150*10mm or 500x500x20mm
two width slate:150*150*10mm. There are two holes in bottom slate.

Slate has a wild side. It's known mainly as the dependably dark gray material of roof tiles, flooring tile,flagstone walks, villa,church,craft and old school blackboards.
Technically, slate is a dense, fine-grain, clayey metamorphic rock that splits readily into thin but durable slabs. Minerals present in the rock cause its colors to vary widely--often within a single tile. Made up of layers, slate has a naturally uneven texture and a less formal look than surface-ground granite or marble, but its extremely durable, slip resistant, stain resistant, and fireproof.