Peridotite is an igneous rock essentially composed of silicates, olivine and feldspar, and is usually found below levels of gabbro. It is rarely found in a large enough mass for use as sculpture. This lot is accompanied by a Mineralogical Certificate provided by Mr. Hervé Naudy, Paris, describing the rarity of the stone and designating the weight of this piece as 6,260 karats.
For a diorite figure of similar style in the Brooklyn Museum of Art see no. 24 in Bianchi, Cleopatra's Egypt. Age of the Ptolemies.