How to make crafts from gypsum at home

Calcium sulfate has been used since ancient times — in building and construction, in sculpture, and even in medical services!
Reagents and equipment: 70 g of calcium sulfate (alabaster), a silicone mold, a glass container, a food coloring, 100 mL of water, a spoon, 20% sulfuric acid solution, and 20% calcium nitrate solution.
To obtain calcium sulfate dihydrate, simply mix solutions of sulfuric acid and calcium nitrate.
In order to prepare a gypsum solution, mix it with water in a 7:10 ratio. You may also add a tiny bit of food coloring to the solution. Now, place the obtained mixture into the mold and leave it there for 20—30 minutes to solidify.
Calcium sulfate also occurs in nature in form of minerals — gypsum (calcium sulfate dihydrate) and its anhydrate (anhydrous calcium sulfate).
In a lab, gypsum CaSO4*2H2O can be synthesized by mixing the solutions of sulfuric acid H2SO4 and calcium nitrate Ca(NO3)2, which yields a white crystalline precipitate.
Ca(NO3)2 + H2SO4 + 2H2O = CaSO4*2H2O + 2HNO3
If you were to add water to alabaster, it would eventually solidify with the formation of a durable material.
It is often used in construction, in sculpture, and even for bone fixation in case of fractures.
Precautions: Observe safety measures when working with these compounds. Wear protective gloves, a mask, and safety glasses while conducting the experiment.