AI-assisted community identification

Cobalt Blue

Vitro Agate Company · c. 1940s - 1960s

Cobalt Blue by Vitro Agate Company, identification view
Community photograph · added 26 February 2026

Identification summary

A classic machine-made marble featuring a deep, translucent cobalt blue glass, often used in board games.

Visible record

Maker candidate
Vitro Agate Company
Era
c. 1940s - 1960s
Pattern
Solid
Rarity assessment
Common
Condition assessment
Near Mint
Size
Standard (approx. 5/8")
Material
Glass