Slate Stone

Shale or mudstone undergoes low-grade regional metamorphism to generate slate, a fine-grained, foliated metamorphic rock. It is often used for flagging, flooring, and roofing because of its reputation for strength and beauty.

Product or Service

HS710399 - Stones; precious (other than diamonds) and semi-precious stones; (other than rubies; sapphires and emeralds); worked other than simply sawn or roughly shaped; not strung; mounted or set