NWA XXX Ordinary Chondrite Meteorite Individual, Unclassified, 869.00g, Oriented with Regmaglypts

Flight-oriented complete stone with ablation features

This 869.00g complete individual preserves the exact orientation it held during atmospheric entry. The leading surface shows a smooth, aerodynamically sculpted fusion crust, while the trailing surface displays the characteristic geometry of a meteorite that maintained stable flight. Deep regmaglypts cover the exterior -- thumbprint-like depressions formed as atmospheric pressure sculpted the molten surface during ablation. A single cut window exposes the internal chondritic texture without compromising the intact outer morphology that defines oriented specimens.

The fusion crust displays minimal weathering and retains a glossy black finish across most surfaces. This preservation indicates a recent recovery from the Algerian desert in 2024. The regmaglypts vary in depth and diameter across the stone, reflecting localized variations in ablation intensity as the meteorite decelerated through successive atmospheric layers.

Regmaglypts and fusion crust formation

Regmaglypts form when atmospheric pressure creates vortices in the molten fusion crust during hypersonic flight. These rotating gas pockets scoop material away faster than surrounding areas, carving distinct depressions. The pattern on this specimen indicates stable orientation -- the regmaglypts align with the direction of atmospheric flow across the leading surface. Turbulent flow around the trailing edge produced smaller, more irregular features.

The fusion crust itself formed as frictional heating raised surface temperatures above 1600°C, melting the outermost layer. Rapid cooling as the meteorite decelerated below supersonic speeds froze this glassy coating in place. The preserved crust thickness varies from approximately 0.5mm on protected surfaces to near-ablation on the apex of the leading face, where heating reached maximum intensity.

Scientific context

Ordinary chondrites represent the most common meteorite type recovered on Earth, comprising approximately 80% of observed falls. They formed in the early solar nebula 4.56 billion years ago as dust and small particles accreted into larger bodies. The cut window on this specimen reveals chondrules -- millimeter-scale spherical structures that condensed directly from the solar nebula and preserve a record of conditions in the protoplanetary disk. These chondrites derive from parent asteroids that never underwent planetary differentiation, making them primitive samples of solar system formation processes.

Unclassified specimens await petrographic analysis to determine their specific chemical group (H, L, or LL) and petrologic type. This classification requires thin-section microscopy and compositional analysis beyond initial field identification. For collectors and researchers interested in the formation and evolution of meteorites, visit Learn About Meteorites.

Frequently asked questions

Is this meteorite authenticated? This specimen is confirmed as an ordinary chondrite based on structural and compositional characteristics. It awaits formal classification and submission to the Meteoritical Bulletin, which is standard for recently recovered Northwest Africa finds. A certificate of authenticity documenting its meteoritic origin is included with purchase.

What does "oriented" mean for a meteorite? Oriented meteorites maintained a stable orientation during atmospheric flight rather than tumbling randomly. This stable flight produces asymmetric heating -- the leading surface develops a smooth, aerodynamic profile while the trailing surface remains more angular. The result is a directional shape that records the meteorite's trajectory through the atmosphere.

What are regmaglypts? Regmaglypts are the thumbprint-like depressions visible across the fusion crust. They form when differential ablation rates create local depressions in the molten surface. The depth and distribution pattern of regmaglypts provides information about atmospheric flight dynamics and orientation stability.

What is included with this specimen? You receive the 869.00g oriented individual exactly as photographed, plus a certificate of authenticity confirming its meteoritic origin and provenance details.

Why are unclassified specimens valuable? Unclassified specimens represent recent finds that have not yet undergone formal laboratory analysis and submission to the Meteoritical Bulletin. While they are confirmed meteorites, they await detailed classification work. Some collectors value the opportunity to own specimens before formal classification, while others appreciate having material available for potential future research or donation to institutions.

Display and collector significance

At 869.00g, this specimen provides substantial visual presence while remaining manageable for cabinet display. The preserved orientation geometry makes it a teaching piece -- the contrast between leading and trailing surfaces illustrates atmospheric flight dynamics in a way that tumbled stones cannot. The cut window adds scientific value by exposing internal structure for examination without sacrificing the exterior features that define oriented meteorites.

Fresh fusion crust with minimal terrestrial weathering indicates excellent preservation. The glossy surface finish and well-defined regmaglypts represent optimal aesthetic condition for this specimen type. Oriented ordinary chondrites with this degree of morphological preservation appeal to collectors focused on atmospheric phenomena and entry dynamics. Browse additional specimens in our Chondrites collection.