Grinding device for dried spices and herbs

A method for grinding dried spices and herb, comprising:

• engaging a movable member and a fixed member in a coaxial relationship such that a grinding surface of the movable member and a complimentary grinding surface of the fixed member are in close proximity and form an upper grinding zone between a first series of ribs located on said grinding surface and a first series of complimentary ribs located on said complementary grinding surface, and a lower grinding zone between a second series of ribs located on said grinding surface and a second series of complimentary ribs located on said complimentary grinding surface, wherein said complimentary grinding surface has ribbed zones alternating with smooth zones;
• introducing grinding material at said upper grinding zone;
• grinding said grinding material to a first grain size by rotating said movable member about said fixed member in a first direction;
• releasing said grinding material through to said lower grinding zone by rotating said movable member about said fixed member in a second direction;
• grinding said grinding material to a final grain size in said lower grinding zone by rotating said movable member about said fixed member in said first direction;
• and,
• releasing said grinding material through a lower end of said movable member by rotating said movable member about said fixed member in said second direction.