AI Appraisal Estimate

This item is a clear glass stemmed water goblet featuring a distinctive optic swirl pattern on the bowl. The piece is constructed from colorless soda-lime or lead glass, standing approximately 7 to 8 inches in height. The bowl begins with a flared rim and tapers downward, accented by diagonal ribbing that creates a rhythmic, light-catching spiral effect. The stem is multi-faceted or molded with a central baluster-style knop and a smaller rounded transition at the base of the bowl, providing both structural stability and an elegant aesthetic. The foot is flat and circular, typical of mid-20th-century mass-manufactured glassware styled after Depression-era or traditional patterns. Evaluation of the condition shows no immediate cracks or significant chips, though there is a visible price tag remnant or adhesive residue on the foot which can easily be removed. The glass possesses good clarity with minimal cloudiness. While no specific maker's mark is visible through the glass in this view, the style is consistent with mid-century American manufacturers such as Libbey, Tiffin, or Federal Glass, likely dating from the 1960s to 1980s. The craftsmanship is standard for production-line stemware, featuring seamless transitions but lacking the specialized hand-blown characteristics of high-end crystal.

I have virtually examined this clear optic swirl stemware water goblet. Based on its visual characteristics, it appears to be a mid-century mass-market production piece, likely manufactured by an American company such as Libbey or Federal Glass between 1960 and 1980. The condition is assessed as excellent, with no visible chips or clouding and only minor adhesive residue on the foot which does not affect the glass integrity. The optic swirl is well-defined, providing a desirable aesthetic, though the molded nature of the stem indicates it is a standard production-line item rather than high-end hand-blown crystal. The market for single pieces of mid-century utility glassware is currently saturated; standard water goblets of this type generally sell at the lower end of the kitchenware spectrum unless part of a complete set. These are frequently found in local antique malls and online marketplaces. The primary value lies in its decorative utility rather than rarity. This valuation is based on visual data only. A physical inspection would be required to identify potential microscopic 'flea bites' or to locate a faint acid-etched maker's mark that could refine its origin. Full authentication would require checking for specific manufacturer catalogs or verifying the glass composition through a UV light test to determine the presence of manganese or other additives consistent with specific manufacturing eras.