Alpine aromatherapy stone fragrance ornaments reed diffuser essential oil set(10 ML) car solid aromatherapy stone gifts.Stone expanding material: high-quality gypsum powder. 6 kinds of fragrance: blue wind chime, freesia, vibrant ocean, magnolia, sweet-scented osmanthus, Wizard of Oz. Rich levels of front tone, middle tone and back tone have an intriguing aroma. Natural and soft fragrance, refreshing every breath.When the essential oil is dripped into the stone, it slowly emits a fragrance. This will be different from other aromatherapy products you have used. It does not require heating and uses diffuser stones to emit fragrance.