Opportunity Rover found meteorites just sitting on the plains. The first one analyzed with Opportunitys instruments was called "Heatshield Rock," as it was found near where Opportunitys heatshield landed.  Examination with the Miniature Thermal Emission Spectrometer (Mini-TES), Mossbauer spectrometer, and APXS lead researchers to, classify it as an IAB meteorite. The APXS determined it was composed of 93% iron and 7% nickel. The cobble named "Fig Tree Barberton" is thought to be a stony or stony-iron meteorite (mesosiderite silicate), while "Allan Hills," and "Zhong Shan" may be iron meteorites.