Mottled brown marble found in the parlor of 607 Grove Street during an archaeological excavation. This type of marble is known as a "Bennington Marble." Bennington Marbles are a type of dyed and glazed pottery. This marble looks like the base clay was white, with a coat of brown glaze applied over the top. The name is derived from their look-a-like appearance to pottery made at the Bennington Pottery in Bennington, Vermont. That pottery has no record of ever having produced marbles commercially. In addition, early catalogs list this type as imported. Some of the original boxes found have "Made in Germany" stamped on them. Benningtons are easily recognized by their "eyes." These eyes are spots on the marbles that were left when the marbles touched others during the firing of the glaze. This marble has two small eyes, both round, flat, dark patches. The glaze is uneven on the marble, with darker and lighter patches, and a drip on one side. The marble is not a perfect sphere.
Reference: Block, Stanley A., ed. Marble Mania. Atglen, PA: Schiffer Publishing, Ltd., 1998.