This is a micro mosaic bracelet, a type of jewelry made from tiny glass tiles called tesserae. The art form originated in Italy and was particularly popular during the Victorian era. The small glass pieces are arranged by hand to create intricate images, often featuring floral motifs or scenes of famous landmarks. Micro mosaic jewelry was a popular souvenir for travelers on the Grand Tour, a cultural trip through Europe. The craftsmanship can be very detailed, with some pieces containing thousands of tesserae per square inch.