Create pencil sketches on a white paper background of a modern necklace design, inspired by the simplicity of the Graff butterfly and the elegance of the Tiffany Victoria key. The necklace should feature a single, central piece that merges these inspirations into a contemporary and minimalistic style suitable for daily wear. Focus on sleek, streamlined elements that emphasize a clean, modern aesthetic. Include sketches from various angles to showcase the refined simplicity of the design, ensuring the entire necklace is depicted without any cutoffs, perfectly capturing its understated yet sophisticated appeal.