I have seen this labelled Françoise d’Orléans and Isabelle d’Orléans, but Françoise was considerably older than this sitter by the 1890s.
From the lost gallery's Photostream on flickr; spots removed with Photoshop by extensively altering the background and the original monocolor tint removed.
Isabelle's head rises like a mushroom (minus the hat) above a textured base from the peak formed by her shoulders framed by her expansive sleeves. Her bodice is adorned with a center panel framed by lace rufflesShe is wearing something like fripon curls on her forehead.
Keywords: 1896, Princess Isabelle of Orléans, princesse Isabelle d’Orléans, Duchess of Guise, duchesse de Guise, Orléans family, Princess, Duchess, French, straight coiffure, pouter pigeon bodice, high enclosing neckline, lace ruff, pin, Russian upper sleeves, long close under-sleeves, lace cuffs, bracelets, waist band, natural waistline, A-line skirt