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Where does natural boric acid occur?

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A labeled diagram of the periodic table entry for boron shows its atomic number 5, symbol B, electron configuration, atomic weight range, and classification as a solid, weakly acidic, other nonmetal with a rhombohedral crystal structure at room temperature. — boron Properties of boron.

Natural boric acid, also known as the mineral sassolite, occurs in specific geological environments. It is primarily found in volcanic waters and hot springs. Additionally, it can occur as an incrustation in the form of small, pearly scales.1

Beyond these settings, boric acid is also found in certain minerals.