A necklace with carnelian, lapis lazuli, white onyx, and black onyx stones would create a striking combination of colors and energies. Carnelian brings warm, vibrant tones, lapis lazuli offers deep blues, white onyx adds a touch of elegance with its light color, and black onyx provides a bold contrast. This piece would be visually stunning and carry a mix of properties associated with these stones, such as protection, creativity, and clarity. Would you like ideas for a specific design or arrangement for these stones?