Most mines use an inexpensive process called “milling” to process their zeolites, which crushes the zeolite into smaller pieces. Micronizing cuts the Zeolite using specialized equipment that keeps the Zeolite cage intact and effective.
Think of a bee’s honeycomb and what would happen if you just crushed it. The structure would be destroyed. However, if you cut it with a knife, the honeycomb would remain intact but in smaller pieces. That is a perfect example of the difference between milling (crushing) and micronizing (cutting). The cage-like structure of a zeolite is part of the reason it offers its unique benefits. Micronization preserves that structure.