Mid-century style blue rhinestone jewelry set

This costume jewelry ensemble consists of one large brooch and a pair of clip-on earrings. The pieces feature a variety of faceted glass rhinestones or crystals in dark navy, royal blue, and light aqua or seafoam tones. The stones are presented in various cuts including pear, marquise, and round brilliant shapes, all secured within silver-toned metal prong settings. The brooch is designed with a radiating cluster pattern, while the earrings appear to be designed as matching sprays. This style is consistent with mid-20th-century costume jewelry, particularly from the 1950s or 1960s. No signatures or maker's marks are visible in the photograph, though the quality of the prong settings and the complexity of the arrangement are consistent with higher-end vintage costume jewelry manufacturers such as Juliana (DeLizza & Elster) or Kramer, though such attribution remains a hypothesis without physical inspection and the sighting of specific construction hallmarks. The condition appears fair with some visible wear to the metal finishes and minor surface dust; the stones appear mostly intact and bright, though physical testing would be required to rule out foil decay or flea bites.

Based on my visual assessment of the provided image, this mid-century costume jewelry set displays characteristics of higher-quality vintage production from the 1950s or 1960s. I can observe a complex arrangement of multi-tonal blue rhinestones in various cuts, including pear and marquise shapes, which appear to be held in traditional prong settings. The color palette and 'puddle' soldering visible on similar sets suggest a hypothesis of attribution to manufacturers like DeLizza & Elster (Juliana), though I cannot verify this from a photo alone. The estimated value of $125 - $225 assumes the set is an unsigned piece from a sought-after maker of that era. This value is based on the current collector market for 'blue iceberg' or specialty rhinestone sets, which remains steady. However, the value is highly dependent on an in-person inspection to rule out foil backing degradation, 'flea bites' on the crystal facets, or repairs that are not visible in the photograph. I would need to examine the pin mechanism and the back of the earrings to look for specific construction hallmarks to strengthen any attribution. Without a confirmed association with a specific high-end maker, or if the set is determined to be a later 'in the style of' production, the market value would likely decrease to the $45 - $75 range. To provide a more precise valuation, I would recommend a physical examination to check for metal oxidation and to verify the stones are glass rather than acrylic. The lack of visible signatures is common for certain prestige manufacturers, but physical verification of the assembly techniques is essential for a definitive market placement.