No Fusion Crust

If a rock does not have a fusion crust, then there is no reason to suspect that it is a meteorite no matter how many other meteorite-like features it may have

A fusion crust is the most characteristic feature of a meteorite. If it has “worn off” from abrasion and ablation, then it is all but impossible to identify the rock as a meteorite just “by looking.”

Think of it this way: If she is wearing a pretty dress and playing a grand piano on a stage with a symphony orchestra behind her, then she is probably a concert pianist. If she is jogging down the beach with her dog, then she might be a concert pianist, but probably not. How can you tell?

These rocks do not have fusion crusts because they are not meteorites, not because the fusion crust “wore off.”