AI-assisted community identification

Slag (Black/Dark Amethyst/Blue)

Christensen Agate Company · Late 1920s to Early 1930s

Slag (Black/Dark Amethyst/Blue) by Christensen Agate Company, identification view
Community photograph · added 25 August 2026

Identification summary

An early American machine-made slag or swirl marble with a rich dark amethyst or black base swirled with smoky blue and gray ribboning.

Visible record

Maker candidate
Christensen Agate Company
Era
Late 1920s to Early 1930s
Pattern
Swirl
Rarity assessment
Rare
Condition assessment
Near Mint
Size
Shooter (approx. 1 inch / 25 mm)
Material
Glass