The results of the investigation by APXS, and the rover's laser instrument, ChemCam, revealed the rock to be anything but dull.

BBC: Cosmic coincidence on the road to Glenelg

But the science team on Curiosity needed a target to try out the first close-contact work using the rover's arm-held X-ray-spectrometer, APXS. So the dark pyramid was chosen and informally given the name Jake Matijevic in honour of a recently deceased rover engineer.

BBC: Cosmic coincidence on the road to Glenelg

Although APXS and ChemCam will tell you which chemical elements are present, they don't tell you how precisely those atoms are arranged into the crystalline structures that make up the rock, and both this mineralogy and the chemical composition are ideally needed to assign a rock name.

BBC: Cosmic coincidence on the road to Glenelg