› Forums › Forum › do crystals lose their healing properties if they are heated at low temperatures in an oven? This topic has 6 replies, 1 voice, and was last updated 10 years ago by . Creator Topic December 10, 2011 at 5:35 am #43132 AnonymousInactive Up0Down:: i’m making crystal hangers using clay that needs to harden in the oven. so i’m wondering if this damages the energy of the crystal or if it doesn’t make a difference Creator Topic You must be logged in to reply to this topic.