NWA 16120 LL3 Ordinary Chondrite Meteorite Slice, 96.01g, Primitive Type 3 Texture

Large primitive chondrite slice with well-preserved type 3 features

This 96.01-gram slice of NWA 16120 preserves the coarse texture characteristic of type 3 ordinary chondrites. The low petrologic grade means this material experienced minimal thermal metamorphism after accretion, retaining the physical structure of the earliest solid material in the solar system. Individual chondrules remain distinct throughout the matrix rather than blurred by heat, and the primitive mineralogy remains largely unaltered from its original state 4.567 billion years ago.

The slice format provides full visibility of the internal structure across a broad cross-section. The LL classification indicates low total iron and low metal content compared to other ordinary chondrite groups, with most iron locked in silicate minerals rather than present as free metal. This specimen's size makes the textural features readable without magnification while maintaining scientific value for study or display.

Preserved chondrule structure and primitive matrix

Type 3 chondrites like this specimen retain sharply defined chondrule boundaries that have not been homogenized by thermal processing. The matrix between chondrules preserves fine-grained dust and mineral fragments that condensed directly from the solar nebula. Opaque mineral grains distributed throughout represent unoxidized metal and sulfides that formed under reducing conditions in the early solar system.

The surface texture shows the natural heterogeneity of primitive chondritic material, with variations in grain size and composition visible across the slice. This textural preservation is what distinguishes type 3 chondrites from higher petrologic types, where progressive metamorphism erases these original features.

Scientific context

LL ordinary chondrites represent material from the outer regions of the asteroid belt, where lower temperatures during solar system formation resulted in less efficient iron incorporation into accreting bodies. The type 3 designation places this specimen among the most scientifically valuable ordinary chondrites because minimal alteration has occurred since the original chondrule-forming events.

These meteorites formed through the collision and gravitational accumulation of dust, chondrules, and other small particles in the protoplanetary disk. The preservation of this original texture provides a direct record of conditions and processes operating during the first few million years of solar system history. Researchers study type 3 chondrites to understand nebular condensation sequences, chondrule formation mechanisms, and the thermal history of early asteroids. Learn About Meteorites to explore how these primitive specimens fit into the broader classification system.

Frequently asked questions

Is this meteorite authenticated? Yes, NWA 16120 is classified in the Meteoritical Bulletin as an LL3 ordinary chondrite found in Northwest Africa in 2023. You can verify this classification through the Meteoritical Bulletin database. This specimen includes a certificate of authenticity documenting its classification and provenance.

What does the LL3 classification mean? LL indicates low total iron content and low metal content within the ordinary chondrite group. The 3 designates the petrologic type, meaning this material experienced minimal thermal metamorphism and retains primitive textures including well-defined chondrules and unequilibrated mineral compositions.

What is included with this specimen? You receive the 96.01g slice and a certificate of authenticity. The listing notes a GemBox display case, which provides protective storage and clear visibility of the specimen.

Why are type 3 chondrites important to collectors? Type 3 specimens preserve the original structure of solar system material before significant thermal processing occurred. This makes them scientifically significant and visually distinct from higher petrologic types, where metamorphism has blurred or erased primitive features.

How should I handle and store this specimen? The slice can be handled directly, though clean hands or gloves prevent oil transfer. The display case protects the specimen from dust and physical damage while allowing full viewing. Store away from humidity extremes to prevent oxidation of metal grains over long timescales.

Display-ready primitive material for serious collections

At 96.01 grams, this slice provides substantial presence for display while remaining accessible for collectors building representative suites of ordinary chondrite types. The low petrologic grade makes this specimen scientifically comparable to material analyzed in meteorite research, not just a decorative piece. Type 3 chondrites like NWA 16120 anchor collections focused on primitive solar system materials.

The size allows clear observation of textural features that define this petrologic type, making it effective for educational use or comparative study alongside metamorphosed specimens. Browse additional primitive specimens in our Chondrites collection or explore contrasting metamorphic grades in our Ordinary Chondrites selection.

Meteoritical Bulletin entry: NWA 16120 | Classification: LL3 Ordinary Chondrite | Find, Northwest Africa, 2023