Identifying art glass can be a difficult task, but there are some calling cards when it comes to Blenko. Some pieces are signed, which certainly makes things easy. Some have stickers, which are also helpful—not only do they indicate that the glass is Blenko, but it will also identify the first year the design was made.

How can you tell if a glass is Blenko?

Look for tooling marks, bubbles and striations in the glass: all signs that the glass has been hand-blown. Blenko glass is all hand-blown. Verify the absence of mold lines. Blenko glass is blown into a wood mold, but then it is spun, which smooths out mold lines completely.

Is Blenko Glass valuable?

10 Vintage and modern examples of Blenko glassworks are often an affordable option for starting a glass collection. In addition, during auctions in 2017, the prices paid for Blenko glass listed on LiveAuctioneers and Invaluable realized prices of $10 to $700.