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.
Rare Green & Blue Slag Glass Nugget – Strong Magnetism – 528g / 1.16 lbs – The Portal Find
Blue & green layered slag glass nugget – rare color combo with strong magnetism from The Portal.
This rare slag glass nugget features striking layers of blue and multiple shades of green glass fused with black slag. Exhibits strong magnetism and unique textural patterns, making it a one-of-a-kind collector’s specimen.
Weight: 528g / 1.16 lbs
Origin: The Portal – former 1900s industrial factory site
Features: Layers of blue & green slag glass with black slag; strong magnetic attraction
Condition: As found, lightly cleaned
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 sites
Shipping:
Carefully packaged with bubble wrap and shipped with tracking to ensure safe arrival.
Own a genuine piece of American industrial history — once it’s gone, it’s gone.
