Pallasites

These are my favourite types of meteorite! They originated at the boundary between the core (nickel-iron) and the mantle (olivine) of disrupted planetissimals. Beautiful crystals of peridot / olivine are suspended in a shiny metallic matrix: the crystals can be red, green, brown or yellow. The one I'm holding is a recent find from Kenya called Sericho (The majority of meteorites are named after the nearest town to their place of fall or discovery) The others are all Russian: Seymchan and Pallasovka... This class of meteorite is several orders scarcer than diamond or gold, but still surprisingly inexpensive.