Raspberry ketone (also known as raspberry crystals) is a very versatile sweet crystalline chemical that can be used in traces to add a fruity sweetness to materials like Vanillin or Heliotrope. It is used to great effect in Coco by Chanel to unify the resins and add novelty to the oriental type of scent. It is definitely a must have material and we recommend diluting it to 10% as it is significantly more impactful than you would expect. Steffen Arctander describes it thus: "This ketone is used in perfume compositions, particularly in Jasmin, Gardenia, Tuberose, etc. where floral notes need fruity undertones, or where fruity notes need fixation and supporting delicate sweetness. One known Jasmin speciality contains a considerable proportion of this material in its fruit-preserve-like undertones and terminal notes."