Studio Art Glass Iridescent Tumbler

This item is a hand-blown studio art glass tumbler or vessel, characterized by a multi-chromatic teal and seafoam green color palette. The piece features a distinctively textured, organic body with undulating 'crushed' or wavy indentations that suggest the glass was manipulated while molten to create a sculptural, tactile surface. A prominent feature is the high-gloss iridescent finish, likely achieved through the application of metallic oxides during the firing process, resulting in a luminous, oil-slick effect that reflects hues of lavender, gold, and pink when caught by the light. The vessel has a tapered profile narrowing toward a polished base, with a smooth, slightly rounded rim showing professional finishing. Condition-wise, the object appears to be in excellent contemporary state with no visible chips, cracks, or significant scuffing, maintaining a vibrant luster. The style is indicative of late 20th-century to early 21st-century American studio glass movement craftsmanship. While no maker's mark is visible in this view, the quality of the glass distribution and the sophistication of the iridescent coating suggest a skilled artisan or professional glass studio production.

I have carefully examined the provided images of this studio art glass tumbler. The piece displays a high degree of technical proficiency, specifically in the application of the fumed metallic oxide iridescence and the controlled 'crushed' manipulation of the vessel walls. The teal-to-seafoam transition is vibrant, and the polished rim/base indicates professional finishing consistent with late 20th-century American studio glass. Based on visual inspection, the item appears to be in excellent condition with no visible internal fracturing or surface abrasions. The market for unsigned studio glass remains steady but is significantly lower than for pieces by recognized masters like Lino Tagliapietra or Dale Chihuly. This item compares favorably to works by regional studios such as Lundberg Studios or Orient & Flume, though the lack of a visible signature suggests it may be a production piece or a highly skilled 'seconds' item. In the current secondary market, decorative iridescent glass of this size and form typically realizes $125 to $225. Value is driven by the complexity of the undulating texture and the quality of the 'oil-slick' luster. However, a significant limitation of this appraisal is the absence of a maker's mark or signature. My assessment is based solely on digital images; a physical examination is required to verify the presence of a faint acid-etched signature or a pontil scar that could confirm a specific artist. Full authentication would also require provenance documentation or a catalog search of known studio shapes. Without a confirmed attribution, the value reflects its merit as a high-quality decorative object rather than a branded collectible.