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Authentic German Transitional Furnace Marble dating to circa 1880–1910, exhibiting the classic banded agate / chalcedony imitation seen in late 19th–early 20th century German furnace production. Excellent color layering with strong red & white banding and distinct wave pattern. Desirable UV-reactive transmission under blacklight (see photos), consistent with selenium-based formulations used in period furnace glass.Size: approx. 16 mm
Origin: Germany
Type: Transitional furnace (pre-machined)
Composition: Glass, banded chalcedony/agate imitation
Era: c.1880–1910
Finish: High gloss, hand-furnace
Fluorescence: UV-reactive (transmission band visible)Condition: Displays honest period surface wear including minor contact marks consistent with age and handling. No cracks or structural issues. Please review photos for optical characteristics and condition.Notes for collectors: This is a legitimate early furnace imitation example with desirable chalcedony/agate style banding, not a modern reproduction. Proper UV transmission, furnace striation, and size profile place it firmly in late 19th–early 20th c. German production. Transitional furnace marbles in this agate/chalcedony imitation class are scarce and increasingly collected as German categories continue to be separated and better attributed.Ships well-protected with care.Collector Confidence: All marbles offered are described accurately and photographed under multiple lighting conditions for attribution and evaluation. Additional photos or lighting angles available upon request.Search Keywords (collector SEO): German transitional furnace marble, agate imitation, banded chalcedony, UV reactive glass, antique marble c1880–1910, selenium glass, transmission marble, early German furnace, collectible marbles, vintage toy glass, machine pre-transition
