Fusion crust has taken on a renewed importance in the authentication of specimens. But beyond its utilitarian use, it is really a sheen of solidified lava that reflects both the turmoil of the meteorite’s arrival on earth, but also expresses the individual chemical makeup of the space rock when melted.
From foamy jet-black, to tar-like shiny plastic, to milky brown paint, fusion crust is a characteristic of meteorites whose value only appreciates, and beauty only grows as one delves deeper into meteorite collecting. Here are a dozen examples of crust from my collection. Each is a testament to the extraordinary and individual nature of these beasts.
Fell: October 5, 1827