A jewelled silver-mounted nephrite paper knife

A jewelled silver-mounted nephrite paper knife
Probably Russia, late 19th century, apparently unmarked
Rectangular of slightly tapering flattened form, the handle encircled by a chased snake, the head set with a cabochon ruby, with a pointed tip; together with a nephrite paper knife, probably Russian, of tapering flattened form, apparently unmarked
5 15/16 in. (12.2 cm.) long (2)