Push comes to shove, a good mortar and pestle work well. Besides the grinder we have, my wife uses a m&p on occasion. Good exercise.
For a reliable spice grinder, I recommend the Krups F203. It’s affordable, durable, and designed specifically for spices and coffee, so it handles hard seeds and herbs well. Another solid option is the Cuisinart SG-10, which is easy to clean and has a good capacity. Both are straightforward to use and built to last. Avoid cheap, noisy models that don’t grind evenly. If you want something manual, the JavaPresse Manual Grinder is great for small batches and offers good control. These are trusted by many home cooks and won’t disappoint!I did some research on this topic myself awhile back. I had been using an old blade coffee grinder but, somehow, spices had crept into the area where the blade spins and it seized up. In the course of my research, I learned that "burr" grinders are generally preferred because they tend to produce a more uniform grind than blade grinders. With that in mind, I bought a cheap Mr. Coffee burr grinder at Walmart and dedicated it to spices. It works great. It has a selector for the size of the grind, so you can grind spices coarsely or finely.
One thing I don't like is the burr grinder can be a pain to clean. The part that stays in the machine can't be submerged in water so I use a can of compressed air to blow it out after using it minimalist home accessories.
Push comes to shove, a good mortar and pestle work well. Besides the grinder we have, my wife uses a m&p on occasion. Good exercise.
As is mine. A little difficult to clean around the non-removable blades but does a fine job (pun intendedI think mine is an older Black & Decker coffee grinder. Still works fine.