A Rosary is a string of beads with a crucifix. You might also make a 10 decade or a 15 decade rosary. You might use either glass or gemstone beads. You might select different colors for your Hail Mary Beads and your Our Father Beads. When selecting a different color, it is best to use either a clear bead or a contrasting color.
Most people use garnet, amethyst or black onyx colors.
You might use the colors of your birth stones . Most people use beads sized between 4mm and 8mm. You might use glass or gemstone. You might use smooth round or faceted round beads. The Our Father Bead should be larger than the Hail Mary beads.