Pittsburgh Corning Glass Block Value Guide

Pittsburgh Corning Glass Blocks are quintessential relics of the Art Deco and Mid-Century Modern movements, prized for their unique ability to diffuse light while providing structural insulation. These American-made glass pieces became architectural staples, ranging from industrial building materials to specialized decorative items like the 'penny bank' versions.

What Is Pittsburgh Corning Glass Block Worth?

The typical price range for Pittsburgh Corning Glass Block is $20 - $20 based on recent sales. However, values can vary depending on the item's condition, rarity, and other factors such as:

• Condition of the glass, specifically the absence of chips, cracks, or internal fogging from seal failure.
• Rarity of the pattern, with the dimpled texture being a classic but specific geometric designs commanding more interest.
• Historical context, such as whether the block was a standard architectural unit or a specialized consumer item like a coin bank.
• Clarity and color of the glass, as older blocks may show slight tinting or 'solarization' depending on their original chemical composition.

How to Identify Pittsburgh Corning Glass Block?

• Look for the distinctive dimpled pattern molded into the glass surface, a signature of many Pittsburgh Corning designs.
• Check for the manufacturer's name or logo often embossed along the narrow perimeter or 'mortar' edge of the block.
• Examine the thickness and weight, as authentic vintage blocks are made of heavy, solid glass designed for structural load-bearing.
• Identify specific variations such as the 'penny bank' model which features a pre-cut coin slot for decorative household use.

History of Pittsburgh Corning Glass Block

Glass blocks gained significant popularity in the Art Deco and Mid-Century Modern architectural movements for their ability to allow light while maintaining privacy and insulation. Pittsburgh Corning was a prominent manufacturer, known for producing a variety of patterns and sizes that were incorporated into buildings and even household items, such as the 'penny bank' versions mentioned in some listings, which were designed to be decorative coin banks.