Ring with engraved face and gemstone setting

Ring with engraved face in blue satinized Murano glass with a headdress of 6 sapphires, 4 emeralds, 6 rubies in a fine quality and 5 brilliant-cut diamonds totalling ca. 0.1 ct, 18K yellow gold, 17 g, ring size 54, Italy 20th/21st century, minor signs of wear, with engraved signature, perhaps 'tionto', beautiful craftsmanship, including copy of value certificate (2024): 4,850 €.