Imagine yourself in a coniferous forest. A downpour has just ended. Drops continue falling from the canopy above. The ground soggy beneath your feet. Air scrubbed clean by freshly fallen rain. An atmosphere of lingering ozone. This is Petrichor. 
 
Top: Juniper Berry, Ozone
 
Heart: Aquatic Notes, Armoise, Fir Balsam
 
Base: Cedarwood, Jatamansi, Wet Earth