Soapstone is a very dense variety of talc, known as Steatite, formed from the composition of talc and other minerals during rock metamorphosis.  It is principally grey or grey/green in color, with varying degrees of white veins of pure talc.  Soapstone is best known for having a soapy feel - hence the name.  The surface of soapstone is most commonly sold with a honed finish, which is smooth, like a polish, but is non-reflective.  Other finishes are also available, like leather finish.

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Traditionally, soapstone is treated with mineral oil to aid in sealing, and to enrich the color by turning it a dark rich color.  A periodic application of mineral oil is the only maintenance it needs.  Like old silver, soapstone develops a patina over time, which gives it a rich, antique character.