Black Onyx
Marble King · 1960s - Present
Identification summary
Standard American machine-made solid opaque black glass marble with glossy finish, commonly called Black Onyx.
Visible record
- Maker candidate
- Marble King
- Era
- 1960s - Present
- Pattern
- Solid opaque - no pattern
- Rarity assessment
- Common
- Condition assessment
- Good
- Size
- Standard - 15mm (~0.59 inch, 5/8-inch class)
- Material
- Opaque soda-lime glass
Why this candidate
Solid opaque jet-black glass sphere with high-gloss finish and no visible pattern matches Marble King's long-running Black Onyx exactly. Size 15mm is standard 5/8-in play size they mass-produced.