Begin with the back top of the pendant using a 14mm rivoli, various size beads, and pearls. Create sections between each pearl and connect beads around the perimeter. Add crystals and beads to bend in the sides, preparing to insert the crystal in the center. Build the sides to create prongs that securely hold the rivoli. Repeat the process for a larger 18mm rivoli, ensuring to increase the number of beads correspondingly. After completing both parts, connect them, ensuring proper alignment and secure attachment. Finally, create a bail at the top of the pendant for hanging on a necklace.