Mosaic Workshop

Curved or wheeled blades are usually recommended for cutting glass.  This is because the curved shape concentrates force on the smallest area, thus ensuring the cleanest possible fracture in vitreous materials.  Straight blades exert force all along their length and, as a result, can crush glass, causing flying splinters and sharp fragments in your working area.    The added advantage with  a curved or wheeled blade is the fact that the contact area between the tool and the material is tiny, so the blades stay sharper for longer.    Almost all of the wheeled nippers allow you, when they begin to feel blunt, to loosen and turn their blades, bringing a new, sharper cutting area into play.  The nippers below are all capable of cutting ceramics, but don't use them for that purpose, as they will blunt more quickly than if you reserve them for glassy materials. 

You should always wear a mask and eye protection when cutting mosaic materials.