Showy light blue Celestine crystals.
Celestine or celestite is a mineral variety of strontium sulfate and the main source of strontium. Its name derives from 'caelestis', alluding to the blue color of one of its varieties.
It is used in the manufacture of television screens, in fireworks, tracer bullets, for glazing ceramics, and in the nuclear power industry, among others.
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.