Tri-Color Boulder (UV Orange)
Vitro Agate Company · Mid-20th Century (c. 1940s-1950s)

Identification summary
A vintage oversized glass marble with a clear base and internal tri-color ribbons that glow orange under UV light.
Visible record
- Maker candidate
- Vitro Agate Company
- Era
- Mid-20th Century (c. 1940s-1950s)
- Pattern
- Internal Swirl / Ribbon
- Rarity assessment
- Rare
- Condition assessment
- Near Mint
- Size
- Boulder / Giant Shooter
- Material
- Glass