This is one of the three forms of the The Blob in the 1988 remake of The Blob. This particular version of the blob is a crystalized version. This piece can be seen at the very end of the film when the Blob is frozen in the town square with CO2. This large piece of the blob was broken away from the large piece as seen at the end of the film.
This item comes with a Letter of authenticity from Robert Devine who was the special effects supervisor for the film, he also worked on many other films such as Tropic Thunder, You Dont Mess with the Zohan, Terminator 3, Godzilla 1988, Titanic, Face/Off, Mars Attacks and countless others.