Starting with the outer border, I've traced the patterns onto a piece of rough rolled medium amber glass. These pieces may also be cut one at a time so that less glass is used. Note that each piece is numbered with a Sharpie pen and is placed on the smooth side of the glass, face down. The opposite side is textured rough rolled. Cuts should always be made on the smooth, non-textured side.
Below, I'm scoring the glass with an oil-filled pistol grip cutter.
The oil works its way into the score. By tapping on the glass repeatedly with the brass end of the cutter, the glass "loosens".
Below I'm using "running pliers" to lightly press down on each side of the score to enable the glass to split as shown.
"Grozier pliers" are used to nip off small bits of glass. Its better to use these pliers to tweak the glass rather than wear down an expensive grinding bit.
Wearing rubber finger tips from Staples, I'm grinding the edges of the glass.