Opal Ghost - with notes of moonflower, lemon, juniper Eighteen charcoal incense sticks tucked into a cork-topped glass tube. Each 7-inch stick burns approximately 30 minutes, and with a charcoal base (instead of wood), you'll experience a cleaner burn and less of the typical 'burning wood' undertone. Hand-crafted in small batches at the Revelrie Arts studio, nestled quietly in California's Sierra Foothills.