There is something about the technological skill and the sense of artistic freedom that glass picture frames convey that encourages people to experiment with highly unusual designs.
Some of these turn out to be quirky, others are breathtakingly beautiful, while yet others combine elements of the two.
The fact that glass picture frames are clear opens up possibilities that are simply impossible with other materials, too.
Wood, for example, is always opaque, so it is much harder to make a frame that displays two photographs back to back.
Glass can also be fused together directly by applying heat, allowing easier, cheaper construction of unusual shapes that would be involved in screwing and nailing together complex pieces of wood.
Some Specific Unusual Glass Picture Frame Designs Browsing through large numbers of frame suppliers who include glass picture frames in their catalogs is an excellent way to discover a highly unusual way of displaying your images.
Many of these frames are extremely elegant and can be used for anything from the funny, informal pictures to the most serious or emotionally important photographs of your life.
Some of the designs you might want to keep an eye out for include:

• Simple upright sheet frames that sandwich two pictures back to back between slim panels of glass.
  This allows you to display different pictures in different directions, or change the picture easily from one scene to the other simply by turning the frame around.
  The panels of glass are mounted upright on a glass base, fused to it as noted above to create single piece.
  The panels may be designed for either a vertical or a horizontal photo.
  
• Cube frames take the principle of the upright frame one step further.
  They are meant for displaying six square photographs at the same time.
  They can be turned to show different pictures at various angles, and are a great conversation piece as well as a piece of glass "table art".
  
• Spinner frames mount a pair of glass panels together upright, letting you put two photos back to back inside.
  Instead of being affixed directly to the base, however, they are joined by a thin shim of glass between their bottom edges, fused for strength.
  The base is a round, oval, or rectangular piece of heavier glass to provide stability.
  The frame is mounted onto this using a metal pivot, so that the panel can be spun easily to show one or the other picture.
  
• Quadruple spinners are quite similar but mount a second pair of panels crosswise to the first, creating a cross-shaped arrangement when viewed from above.
  Up to 8 photographs can be put into each of these spinners, making a truly notable photographic display.
  The base can be round or square for greater stability, and is usually made of very thick glass to weigh down the spinner properly so that it won't tip over as you twirl it.
  
• Some frames also have offset pieces of glass that stick out from behind one another, creating a sculptural effect that has an asymmetrical modern art feel.
  

There's no denying that the 'flexibility' offered by glass picture frames can really perk up the way you display your photographs.
Offering not only fixed 2, 6, or 8 sided frames, glass frames can also rotate for added interest.