👉 Apophyllite is a type of mineral that occurs in two primary minerals, apophyllite and plagioclase. Apophyllite is composed primarily of silicon dioxide (SiO2) and aluminum oxide (Al2O3), with small amounts of calcium carbonate (CaCO3). It is often found in the Earth's crust as a single mineral, but it can also be found in larger crystals or inclusions within other minerals. Apophyllite is known for its
