Objects in designs are only abstract representations of the actual thing. Diamonds symbolize knowledge. Ladders symbolize prosperity, or prayer. Pine Needles symbolize health, stamina, eternal youth. Crosses symbolize Christ, or the Four Corners of the World.
Wheat symbolizes wishes for good health and a good harvest.
Dots represent the tears of Mary during the crucifixion, or stars. Fish symbolize Christianity Curls symbolize defense or protection. Spiders symbolize patience. Roses symbolize love, caring. Triangles symbolize several forms of the trinity.