Aroma Crystals / Scented Sizzlers Aroma Crystals are Scented Sizzlers or simmering granules that release fragrance when heated. They are an alternative to wax melts and can be used in wax warmers or oil burners. You can also use these in your air diffusers. Made from magnesium sulfate, these crystals can absorb up to 30% of their weight in oil, allowing them to release a pleasant scent for a prolonged period. Our fragrances are devoid of parabens and phthalates, ensuring a safe and healthy experience. Using them is simple - just pour the crystals into your wax warmer, heat them up, and enjoy the delightful aroma. Each use can last anywhere from 4-12 hours.