Lotus-style slag glass table lamp

This table lamp features a lotus-flared shade composed of eight bowed, petal-shaped panels. The panels consist of marbled orange-yellow slag glass, which is joined by a dark, patinated metal framework featuring a textured, beaded, or geometric pattern. The shade is capped with a dark metal heat cap and a simple ball finial. The base is an ornate, dark-finished metal stand with Art Nouveau-style scrollwork and a three-footed pedestal base. According to unverified user-supplied information, the shade was originally a hanging lampshade converted to this cast-iron base; this is stylistically consistent with the mixed-media appearance, as the scale of the shade appears slightly large for the slender neck of the base. The glass shows characteristic variations in opacity and color swirling typical of rolled slag glass. The metal finish appears uniform with a dark bronze or black patina, showing minor surface dust but no immediately visible cracks in the glass panels. No maker's marks or signatures are visible in the image, meaning direct attribution to a specific manufacture like Tiffany Studios or Slag Glass Co. is not possible from the photo alone. The design is stylistically consistent with early 20th-century American slag glass lighting, though it could also be a later 20th-century revival piece.

I have examined the lotus-style slag glass lamp based on the provided images and descriptions. Based on what I can see, the piece features attractive bowed slag glass panels with marbled orange and yellow hues, typical of American-style leaded glass from the early 20th century. The user-supplied information suggests this was a hanging shade converted to a cast-iron base, which is consistent with the stylistic mismatch in scale between the shade and the slender pedestal. I cannot verify from a photo the specific age of the leading or the metallurgical composition of the base. The value of $400 - $700 assumes the item is an early 20th-century assembly; if this is a later 20th-century revival or reproduction 'in the style of' the period, the market value would typically decrease to the $150 - $250 range. General market demand for slag glass remains steady among collectors of Art Nouveau and Arts and Crafts decor, though 'marriages' (parts from different lamps) generally command lower prices than unified original sets. To confirm the origin and age, an in-person examination would be required to inspect the soldering techniques, the wear patterns on the heat cap, and any internal markings on the cast-iron base. Scientific testing of the metal or provenance documentation would be necessary to elevate research beyond a working hypothesis. This estimate reflects the current decorative market for unattributed period lighting and would change significantly if the glass were attributed to a specific renowned studio.