Windhoekite
Chemical formula: Ca<sub>2</sub>Fe<sup>3+</sup><sub>2.67</sub>(Si<sub>8</sub>O<sub>20</sub>)(OH)<sub>4</sub>ยท10H<sub>2</sub>O
Cabinet No. 40
Chemical formula: Ca<sub>2</sub>Fe<sup>3+</sup><sub>2.67</sub>(Si<sub>8</sub>O<sub>20</sub>)(OH)<sub>4</sub>ยท10H<sub>2</sub>O