Antique souvenir brooch with dedication,

Antique memorial brooch with dedication, 14K RG, 17.1 gr, W: ca. 6 cm, half pearls and onyx frame, ribs silk fabric under faceted glass, reverse with dedication 'In Memory of my dear Mother _ Eliza Phelps Cook _ West Townshend Vt. June 20´ 1829 _ Chicago Ill. Aug. 18´ 1884 _ Fannie & Farrar', exceptional condition! USA late 19th century, with foldable loop.