But there’s no magic involved, just some very particular geology. The chamber contains giant selenite crystals (gypsum, CaSO4 · 2 H2O), some of the largest natural crystals ever found on Earth.

Temperatures later stabilised at around 58C (136 degrees Fahrenheit), creating the perfect conditions for giant gypsum crystals to form from a mineral called anhydrite. Nevertheless, whilst ...

It exists in several forms, including gypsum, bassanite, and anhydrite, each differing in hydration levels. Understanding the mineralogy and crystal growth dynamics of calcium sulfate is essential ...