When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Details: Weight: 2400g (5.29 lbs) Type: Slag glass / industrial melt Features: green glass, bubble formation, glass inclusions, iron-rich areas Use: display, decor, collector specimen
Large, heavy slag glass specimen weighing approximately 2400g (5.29 lbs). This piece features vibrant green glass throughout with extensive vesicular (bubble) formation and numerous glassy pockets embedded within an iron-rich matrix.
The surface shows a mix of textures including porous bubble structures, rough mineral-like areas, and smooth melted glass sections. The green coloration is especially prominent, appearing in layered pockets and pooled formations created during cooling.
Iron-rich areas add contrast with earthy browns and rust tones, giving the piece a strong industrial character. The combination of color, texture, and weight makes this a standout display specimen.
Sourced from -
The Portal, sculpture in Muskegon, MI. It was recently built (and unearthed treasures) at the former site of a 1900s industrial factory known for producing vibrant, historic relics. These treasures have been buried for 100 years, until now. A remarkable addition for collectors of industrial history, geology enthusiasts, or lovers of unique display pieces.
Why Collect Slag Glass & Industrial Relics?
Each piece is one-of-a-kind
Blends natural artistry with industrial heritage
Highly sought after by collectors, lapidary artists, and display enthusiasts.
Increasingly rare, especially from named historic site.
Own a genuine piece of American industrial history — once it’s gone, it’s gone
