Black Onyx Swirl
Alley Agate · 1930s-1940s
Identification summary
Transparent clear swirl with black onyx ribbon and white filigree, classic Alley construction.
Visible record
- Maker candidate
- Alley Agate
- Era
- 1930s-1940s
- Pattern
- Onyx Swirl
- Rarity assessment
- Uncommon
- Condition assessment
- Good
- Size
- Standard - 16mm (5/8 inch)
- Material
- Glass
Why this candidate
Best match for clear-base machine swirl with wide black ribbon and milky white ribbon, 16mm size, and soft feathered edges typical of Alley Pennsboro/Sistersville production.