NMM 3163 is a classic barred olivine (BO) type micrometeorite.
Note the characteristic stripy surface texture and the changing orientation of the crystal domains. In between the cracks there are huge magnetite crystals, known fondly as “Christmas trees” formations. See also the detail picture that feature fabulous magnetite roses.
This 0.4 mm cosmic gem was found last Friday, during Micrometeorite Field Search #1063 on the roof of an industrial building in Oslo, Norway.
Jon Larsen and Jan Braly Kihle