19mm x 12mm Slag Glass Pendant #0325-01
Pioneer Swirl slag glass pendant. The stone measures 19 mm x 12 mm set in a Sterling Silver bezel setting on an 18" chain.
The Pioneer Kiln Blue pre-dates the Leland Blue source found in and around the Leland Michigan. The Pioneer Kiln opened in Negaunee, Michigan and started producing Pig Iron about 1857. The Pioneer company made two separate plats of the village, the latter naming its village Iron and the former taking the name of Negaunee, which means "pioneer" or "first."
This unique material was a by product of the short-lived days of smelting iron ore from the Upper Peninsula Mesabi iron ranges that supplied the ore. A high grade charcoal made only from beech and maple combined with local limestone flux reduced the iron ore to pig iron, creating a unique foundry glass.
Special thanks to Jasper Shores Jewelers in Negaunee Michigan for the great description of this wonderful material.