Cobalt Slag
Akro Agate Company · 1920s-1930s
Identification summary
A high-quality machine-made slag marble featuring a rich cobalt base with delicate internal swirling.
Visible record
- Maker candidate
- Akro Agate Company
- Era
- 1920s-1930s
- Pattern
- Slag
- Rarity assessment
- Uncommon
- Condition assessment
- Mint
- Size
- Standard (approx. 5/8 inch)
- Material
- Glass