Cut to clear cobalt blue glass bowl

This piece is a striking, deep cobalt blue glass bowl featuring elaborate cut-to-clear geometric and botanical motifs. The item exhibits a vibrant translucent blue outer layer cut away to reveal clear glass underneath, creating a high-contrast visual effect. The interior design showcases prominent starburst or hobstar patterns, elongated leaf or fan shapes with fine cross-hatching, and a central radiating star at the base. The rim is delicately notched and fluted, adding to the fine craftsmanship. The bowl displays a brilliant shine and reflects deep cobalt hues with sharp light refractions on the surrounding yellow and white striped surface. There are no readily visible maker's marks, signatures, or stamps apparent in the provided image. The overall style and cutting technique are consistent with European or American brilliant-cut colored glass from the late 19th to early 20th century, though exact age and origin remain unverified without physical inspection or finding a specific factory hallmark.

Based on what I can see in the photograph, this bowl is a striking piece of deep cobalt blue glass featuring elaborate cut-to-clear geometric and botanical motifs, with a style consistent with European or American brilliant-cut colored glass from the late 19th to early 20th century. I can't verify from a photo alone whether the piece is an autograph work from a specific prominent maker or a later quality reproduction, as I would need physical inspection to confirm material composition and manufacturing techniques. The estimated value range assumes the attribution to the late 19th to early 20th-century brilliant-cut period is correct. In this scenario, comparable items of this type generally command moderate collector interest for their vibrant color and intricate hobstar and starburst cutting. However, if physical inspection reveals the piece to be a later replica, reproduction, or made 'in the style of' rather than an actual period piece, the market value would likely decrease significantly, dropping into the $100 - $250 range. To establish an unhedged identification and fully substantiate the value, one would need in-person examination by a glass specialist, provenance documentation, detailed hallmark or signature verification, and potentially scientific testing to determine glass age and composition.