This meteorite display features a sample of a meteorite from the planet Mars! - a small sample of basaltic shergottite that was recovered from the remote Saharan desert near the Algerian-Moroccan border. This is the same strewnfield that has produced basaltic shergottite meteorites approved under several NWA numbers in the official Meteoritical Bulletin database, including NWA 2975, NWA 4880, and several others.
This Martian-origin meteorite was blasted off the surface of Mars millions of years ago. The source Martian bedrock was a deep basaltic magmatic rock. The impact ejection mechanism was so violent, that the resulting meteorites are highly shocked and contain pockets of melt glass and blackened glass veins.
Refer to the photo. The black centimeter cube is shown for scale and is not included. Your specimen will be a small fragment of this meteorite similar to the one shown in the photo. Each specimen is unique and will vary slightly in appearance. The display box measures approx. 3 inches by 4 inches (75mm by 100mm).
The meteorite specimen is encased in a clear acrylic gemjar which is placed inside a handsome display box that has a black pebblegrain finish and a glass viewing window. The Mars Rock can be removed from the case. The display has color artwork with a vintage Sci-Fi theme, and would make the ideal gift for the science or astronomy geek. This would also make a fine outreach or educational prop and it would look great on display in the office or observatory.
From the Meteoritical Bulletin entry on NWA 2975 (and pairings) -
Achondrite (Martian, basaltic shergottite)
Geochemistry: Pigeonite (Fs35.2–57.6Wo12.6–16.5; FeO/MnO = 28–38) and augite (Fs27.2–41.5Wo30.8–35.2) show mottled compositional zoning. Fe-rich margins of pigeonite contain very thin (0.2–0.5 µm) orthopyroxene exsolution lamellae. Maskelynite is compositionally homogeneous An55Or1.8 in contrast to mesostasis maskelynite (An48–60Or9.2) and glasses. Melt inclusions (15–60 µm, longest dimension) in ulvöspinel have rims of Fe-rich pigeonite (Fs73.5Wo5.8), merrillite, and pyrrhotite; cores are Si-Al-K-Na-rich glass. Bulk composition: Calculated average bulk composition based on analyzed phases and their modes of three melt inclusions is: SiO2 = 70.2, Al2O3 = 8.5, TiO2 = 0.8, FeO = 2.1, MnO = 0.2, MgO = 2.35, CaO = 3.5, Na2O = 0.95, K2O = 2. 1, and P2O5 = 2.8 (all wt%) with trace amounts of NiO, CoO, and S. One melt inclusion contains only fayalite (Fa84) mantled around a core of glass (K2O = 6.4, SiO2 = 78; both wt%).
Classification: Achondrite (Martian basaltic shergottite); moderate to high shock, minimal weathering.