EditorialJasper Cup with Gilded-Silver Mounts, ca. 1350?80, Made in Prague, Bohemian, Jasper, silver gilt mount and foot, Overall: 4 1/8 x 4 1/2 x 3 7/16 in. (10.5 x 11.5 x 8.8 cm), Lapidary Work-Jasper, With its integrally carved trefoil handle, deep dodecahed...