Pebble stone-shaped aroma diffuser

A pebble stone-shaped aroma diffuser, comprising:

• a top cover shell, said top cover shell comprising a top wall, a bottom edge, an accommodation chamber and an opening located on the top wall, said opening having a caliber smaller than the face width of said accommodation chamber;
• an upper panel made from a heat transfer material and fastened to the bottom edge of said top cover shell, said upper panel having a top wall and a bottom wall;
• a gasket ring set in between said top cover shell and said upper panel around said accommodation chamber such that said top cover shell, said upper panel and said gasket ring constitute a fluid container;
• a lower panel made from a heat transfer material, said lower panel having a top wall and a bottom wall, the top wall of said lower panel being attached to the bottom wall of said upper panel;
• a bottom cover shell, said bottom cover shell having a top edge attached to the bottom wall of said lower panel and an inside pace defined therein;
• a heater mounted in the inside space of said bottom cover shell and kept in contact with the top wall of said lower panel and controllable to produce heat to said upper panel;
• and
• a base member provided at a bottom side of said bottom cover shell, said base member holding a power cord electrically connected to said heater for providing electricity to said heater to heat said lower panel and said upper panel.