Clear quartz works like an amplifier for all sorts of things, from prosperity to sexual desire. To use it for increased libido, Cardenas suggests cleansing the crystal with a saltwater soak, rinsing it with cool water, and placing it on your pelvic area. Once that's done, speak your intention into the stone: "I program this crystal to bring me sexual pleasure and fulfilment." This kind of grounding ritual isn't required, but Cardenas and other energy workers recommend intention setting to draw out the metaphysical properties in crystals.