Group of marble and micromosaic objects (4)

comprising: a micromosaic plaque on Belgian black depicting St. Peter's Square, 3.7x3.2 cm. a micromosaic brooch on antique red depicting ruins, 3.5x3 cm. a micromosaic plaque on Belgian black depicting a player within a malachite reserve, 5.5x4.5 cm. a micromosaic plaque on black from Belgium depicting a young commoner 3x2.6 cm.