Cobalt Blue Glass Demitasse Cup

The item is a small, handled cup rendered in a vibrant, translucent cobalt blue glass. It appears to be a demitasse size, suitable for espresso or a small serving of tea or coffee, indicated by its apparent size relative to the hand holding it. The cup has a classic, rounded body with a clear, applied handle that is also cobalt blue. The glass itself exhibits a smooth, polished finish, reflecting light well, although there are noticeable white streaks or residue present on both the interior and exterior surfaces, especially prominent on the top rim and running down the side. This residue suggests either dried liquid, mineral deposits, or potentially paint/lacquer overspray, and would require cleaning to assess the true condition of the glass beneath. There are no obvious chips, cracks, or significant abrasions visible from the provided image. The construction appears to be machine-made, common for glassware, though without a clearer view of the base or manufacturer's marks, it's difficult to determine the exact origin or age. The rich, consistent cobalt blue color indicates the use of specific colorants in the glass-making process. The cup lacks any elaborate decorative elements, focusing instead on its essential form and striking color. The overall craftsmanship appears standard for utilitarian glassware, with no indicators of bespoke or high-art glassmaking. The style is relatively timeless, though the prevalence of cobalt blue glass in household items suggests it could range from mid-20th century to contemporary production.

I have examined the provided image of the Cobalt Blue Glass Demitasse Cup. The item is a vibrant, translucent cobalt blue glass demitasse-sized cup with an applied handle. Its condition, as seen in the image, shows noticeable white streaks or residue on both interior and exterior surfaces, particularly on the rim. This residue would need to be cleaned to properly assess the underlying glass for any chips, cracks, or abrasions. Assuming the glass is intact after cleaning, its condition would be considered good to very good. Based on the uniform color and general appearance, it appears to be a machine-made item, likely mass-produced. There are no obvious indicators of high-art glassmaking or significant age from the image alone. Without maker's marks or provenance, definitive authenticity regarding a specific manufacturer or period is difficult to ascertain from an image. I cannot authenticate its precise origin or age without an in-person examination, which would allow for detailed inspection of manufacturing characteristics (e.g., pontil marks, mold lines), potential maker's marks, and the quality of the glass itself. Provenance documentation could also provide valuable information. Comparable items, generally mass-produced cobalt blue demitasse cups or similar small glassware, are readily available in the market. Demand for such items is moderate, primarily driven by collectors of specific glassware colors or those furnishing vintage-style decor. Given the likely mass-produced nature and absence of unique characteristics or rarity, the value is primarily decorative and utilitarian. The significant residue seen in the image, if not easily removed, would negatively impact its value.