A Scottish Victorian moss agate and citrine vinaigrette

A Scottish Victorian moss agate and citrine vinaigrette, circa 1879, designed as a horn, the hinged cover set with an oval-shaped citrine enclosing an internal perforated cover, the moss agate body set with a gold shield dated 1879, the gold terminal mounted with a further circular-cut citrine, to a fine chain and ring for suspension, length 6.2cm