Iridescent glass decorative bowl

This is a large, shallow decorative glass bowl featuring a distinct iridescent finish that transitions from a darker, metallic blue or purple tone along the scalloped rim into a lighter, frosted silvery-white toward the center. The interior surface is molded with an intricate, repeating spiral or nautilus shell-like pattern that radiates outward from a tight central swirl, creating a hypnotic geometric texture. The rim is gently scalloped with rounded edges, following the contour of the radiating panels. The physical construction appears to be pressed or molded glass. There are no visible maker's marks, signatures, or stamps discernible in the photograph, leaving the manufacturer unverified. The piece displays a glossy sheen with expected minor surface reflections and slight variations in the iridescence typical of mass-produced or art glass decorative items. The stylistic elements are somewhat consistent with mid-to-late 20th-century carnival glass or iridescent art glass production, though without physical inspection or visible hallmarks, the exact age, maker, and material composition remain completely unverified and speculative.

Based on what I can see in the photograph, this large, shallow decorative bowl features an iridescent finish, scalloped rim, and a molded nautilus-like spiral pattern suggestive of mid-to-late 20th-century iridescent art glass or carnival glass production. I can't verify the exact manufacturer, age, or material composition from a photo alone, as no visible maker's marks, signatures, or stamps are discernible to help anchor the attribution. The value estimate range of $100-$200 assumes the piece is a quality example of mid-century iridescent or carnival glass in the style suggested by its visual characteristics. General market demand for decorative molded glass of this type tends to be modest, driven largely by decorative appeal rather than high-end collector frenzy. If this item were determined through physical inspection to be a later reproduction, replica, copy, or simply made 'in the style of' rather than a period piece, the value would likely decrease significantly, perhaps falling into the $30-$60 range. To more fully understand what I am looking at, I would need physical inspection to confirm the glass weight, tactile texture, and any subtle manufacturing seams, alongside hallmark verification and expert appraisal to support a more reliable valuation.