|This article is about an older version of DF.|
Little is known about the famed pearl. Likely, Toady has not yet gotten around to fully implementing pearls yet. The creature definitions for the mussel and oyster include a [PEARL] token, but this token does not actually allow specifying what the pearls would be made of (not to mention the fact that said materials are not actually defined). If you create a material with the [PEARL] property and add it to a creature, though, its butchered remains should be usable at a Craftsdwarf's workshop (much like horn and ivory/tooth).