Light blue anhydrite.
The name anhydrite comes from the Greek and means "without water". It refers to the absence of water in the crystallization of the mineral, as opposed to gypsum (hydrated).
It is very common in salt deposits, but it is very rare to find it crystallized.
The mineral includes a label with the name and origin and is attached to a cardboard box. 4 cm square.
*The price is per unit (a single cardboard box of the four shown in the photo)
Since the minerals are natural, you will receive a piece similar to the one in the photograph. The minerals come in cardboard boxes and are glued to a porex base with hot silicone; these can be removed using ethyl alcohol without damaging the mineral. The size is approximate.