This 10 ml essential oil roller comes with clear quartz gemstones that help keep the oils separated which makes application oh so much smoother.  Clear quartz is believed to amplify energy and aid in concentration and memory!   Essential oils include orange, grapefruit, and bergamot mixed with a carrier oil of sweet almond.  The essential oils are diluted to 5% making them safe for adult use.  Caution should be exercised for those that are pregnant or breastfeeding.   Not intended for use on children.