A Fabergé diamond-set carved nephrite frog on onyx stand St. Petersburg, circa 1900 The frog finely and realistically carved from nephrite, its eyes set with one rose-cut and one single-cut diamond, mounted on a white onyx marble base in the shape of a column, apparently unmarked; sold together with a fitted Wartski box.H: 4 1/4, W: 2 3/4 in. PROVENANCE: Collection of Sir Charles Clore.Christie's, Geneva, "A Highly Important Collection of Works of Art by Carl Fabergé from the Collection of the late Sir Charles Clore," November 13, 1985, lot 12.Wartski, London, 1985. Property from a Private Collection, Main Line, Philadelphia.