Hexagonal Mica Slag Lamp Shade
Decorative Art / Lighting Fixture Component • Unidentified manufacturer; possibly North American, in the style of Bradley & Hubbard, Handel, or Miller Lamp Company.
Style & Movement
Arts and Crafts / Mission Style.
Medium & Technique
Pressed amber mica mineral sheets set in a patinated lead or copper foil metal framework (soldered construction).
Creation Period
Early 20th Century, likely circa 1910–1930 (Arts and Crafts period).
Dimensions & Format
Hexagonal tapered form; estimated 8–10 inches in height with a 10–12 inch base diameter.
Subject Description
A utilitarian six-sided tapered lampshade. The panels are made of natural amber mica, which provides a warm, translucent glow when illuminated. The top is a solid metal cap with ventilation and mounting holes.
Condition & Value Assessment
Condition Assessment
Fair to Good; shows significant oxidation on the metal frame and surface wear on the mica panels.
Estimated Market Value
$150 - $350 USD
Auction Estimate
$100 - $250 USD
Provenance History
Unknown; likely a residential household item from the early to mid-20th century.
Art Historical Significance
Represents the American Arts and Crafts movement's emphasis on natural materials (mica) and visible, honest construction. Such shades were popularized by the Roycroft community and Gustav Stickley's interior designs.
Notable Features
Distinctive hexagonal ventilation holes on the top plate; signature 'hammered' or 'mottled' texture of the mica panels which mimics the organic look of stone.
Condition Issues
Surface oxidation and patina loss on the metal leading; potential flaking/delamination of mica layers; dust and soot accumulation; missing original lamp base.
Conservation Recommendations
Gentle cleaning with a soft brush; avoid abrasive chemicals on mica; treat metal with a museum-grade wax if stabilization of oxidation is required.
Collector Notes
Manufacturer?