Pioneer Swirl Furnace Glass Pendant Copper Replacement Agate and soft purple undertones that

and soft purple undertones that shift with changing light

Others capture pattern

Michigan Upper Peninsula collector specimen

Soft layers of cream

Keweenaw Agate with a few specs of copper

Pioneer Swirl Furnace Glass Pendant Copper Replacement Agate and soft purple undertones thatThis pendant is made from Pioneer Swirl furnace glass, a historic byproduct of early Michigan industrial smelting operations. The swirling patterns are not decorative additionsthey are the result of molten industrial glass cooling under uncontrolled conditions during early furnace processes. As the material separated and solidified, it formed layered movement patterns that are highly variable and never exactly repeatable. Although commonly referred to