Things You'll Need
- Large stone to carve
- Work surface
- Compass
- Angle grinder, with stone grinding attachment
- Mallet
- Tooth chisel
- Flat chisel
Instructions
Place the large stone on a work surface with the face that you want for the bowl of the bird bath facing upright.
Draw a circle with a compass on the top surface of the stone. This will define the edge of the bowl for the bird bath.
Use an angle grinder with a stone grinding attachment to grind a grid pattern inside the circle you have drawn. Space the lines in the grid approximately ½ inch apart. Grind around the perimeter of the circle. The depth of the ground lines should be approximately ½ inch.
Use a tooth chisel and a mallet to break out each of the squares in the grid. Repeat the grinding process and chiseling out process until you have reached a depth that you are satisfied with for the bird bath bowl.
Use a flat chisel and mallet to refine the curves of inside of the bowl. Create a smooth surface inside the bird bath. Smooth out the outside edge of the bird bath bowl with the flat chisel. Chip off small pieces at a time until the perimeter is completely smooth.