If you’d like to learn more about Idaho’s pumice, then check out the Idaho Bureau of Mines and Geology report. It’s not something you really have to search for. Gathering samples is easy: visit somewhere near a mine and break off a piece. Other pumice will run from tan to off-white for the most part. This simply means it has a more even consistency and color, usually bordering on white in the case of the highest grade. Idaho isn’t one of the top two producers of pumice in the US, but it does produce higher quality pumice than any other location. That’s right: pumice is a volcanic glass since it lacks a defined crystalline structure. Rapid cooling from sudden air exposure combines with the sudden depressurization of trapped gasses leaving the stone, creating an airy stone that’s composed of volcanic glass. It’s essentially the “froth” of magma solidified. Pumice is pyroclastic, thrown from a volcano during an eruption. It’s not the first on many collector’s lists, but it’s an important mineral resource for the state of Idaho. Pumice is a volcanic stone that’s highly porous, and often used in cleaning products and construction.
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