Art Deco 1920’s "Stair-Step" Geometric Blue Slag Glass Silver Bar Brooch
Art Deco 1920’s "Stair-Step" Geometric Blue Slag Glass Silver Bar Brooch
Materials and Features:
Vitreous Blue & White Slag Glass: A hand-set rectangular slab featuring high-swirl "Blue Sky" saturation, characteristic of early 20th-century artisanal glasswork.
High-Gauge "Stair-Step" Architecture: A bold, multi-tier geometric silver frame inspired by the ziggurat motifs of the 1920s Machine Age.
Mechanical Claw Mounting: Heavy-gauge silver prongs hand-crimped over the glass for maximum structural security.
Imitation Marcasite Shield Detailing: Intricate, die-struck metallic accents providing the subtle glitter of faceted pyrite.
Mixed-Purity Silver Alloy: A high-density 65%–75% silver-tested frame, offering a durable, archival weight that resists the warping of modern alloys.
Mechanical Integrity: Precision lever safety catch with a heavy-duty pin for a secure "Survivor" closure.
Age/Origin: c. 1920
Marks: Unmarked
Measurements:
Weight: 9g (Substantial "Investment" Density)
Dimensions: Approx. 2.25 Inch length x 0.625 Inch wide
Condition: Good vintage condition. The blue slag glass remains vibrant and secure. The reverse shows a minor internal corner chip (backside only) and the "honest" estate bowing to the pin and frame—markers of its 100-year history that do not detract from the front-facing Art Deco silhouette.
Please note that it is upon visual inspection and many years experience that we are identifying gemstones, We give our best opinion but please see photos to determine the authenticity of the gemstone as we are not certified gemologists. Further pictures can be taken or questions answered upon personal request. Diamonds are tested with ‘The diamond selector II’ authenticator apparatus tool, gold and silver are acid tested where applicable and only when indicated in the item listing as such.
