Crystalized branch with gypsum under glass ( Australia)

In Australia in the state of Victoria, there are several saline lakes. One of them, Lake Wahpool, is covered with water for 3 months a year, and groundwater resurge into springs in this lake. Sulfate-rich underground. This water precipitates minerals dissolved in this saline water, forming, according to the proportions of halite, alunite, gypsum... contained in the water the perfect conditions for a crystallization. So, with the arrival of the spring heat, any object that would have fallen into the lake will be covered with gypsum crystals. More or less colored according to the traces of iron, aluminum... contained in the water. This lightweight and fragile object is therefore a tree branch fallen during the winter on the shores of the lake.