Astral Figurines are only found in Caves, Mantles, Core, and very rarely, in Ravines. They start as Ice-olated Specimen before being dug up, resembling snowmen.
Uses
Ice-olated Specimens can be "used" or dug out with the Terrain Tool and "common" specimens give one of the following: Automaton 009, Mysterious Biofuel, Noxothane, or Cosmic Bauble. In the Mantles and Core, the "common" specimens instead give Resipound. There is also a larger variant of these specimens that is not labeled as "common" in these regions, and they give a Leek.
Trivia
Currently, we only can see ones that have the description of "Common".