This specimen is a fragment of the black, reaction cured glass coating of the HRSI Space Shuttle Tile which appears in the Fourth Edition of the Mini Museum. 

NASA disposition paperwork accompanying the tile indicates it was removed after the Space Shuttle Columbia’s 7th mission, STS-61-C, which flew on January 12, 1986.

As pictured, the item is roughly the size of a standard Mini Museum specimen (4-5mm). The glass coating is very thin, so for protection, this item will be enclosed in an acrylic specimen jar. The jar is housed in a glass-topped riker display box measuring 4x3x1 (inches). A small information card will accompany the specimen, which also serves as the certificate of authenticity.