SKU: 98224296542

NWA 17918 Diogenite-pm Meteorite End Cut, 13.33g, Polished Breccia Texture from Vesta

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Description

NWA 17918 Diogenite-pm Meteorite End Cut, 13.33g, Polished Breccia Texture from VestaPolished window into Vesta's deep crust This 13. 33g polished end cut reveals the complex internal architecture of a polymict diogenite breccia. The mirror polished surface exposes distinct orthopyroxene rich clasts set within a matrix of comminuted impact debris, documenting multiple collision events on asteroid Vesta's surface. The cut preserves sharp boundaries between individual fragments, each representing different zones within the asteroid's

Polished window into Vesta's deep crust

This 13.33g polished end cut reveals the complex internal architecture of a polymict diogenite breccia. The mirror-polished surface exposes distinct orthopyroxene-rich clasts set within a matrix of comminuted impact debris, documenting multiple collision events on asteroid Vesta's surface. The cut preserves sharp boundaries between individual fragments, each representing different zones within the asteroid's lower crust or upper mantle. Polishing brings out subtle color variations between clast types and highlights the three-dimensional structure of this impact-assembled rock.

The specimen's form as an end cut provides both a display face showing the full brecciated texture and a natural exterior surface on the opposite side. At 13.33g, this piece offers substantial mass for a diogenite sample while maintaining excellent visual clarity of the polymict structure. The polish reveals grain boundaries and crystal orientations within individual pyroxene fragments.

Orthopyroxene clasts and impact assembly

The dominant mineral phase visible throughout this section is orthopyroxene, the defining component of diogenitic material. Individual clasts range from millimeter-scale fragments to larger domains spanning several millimeters, each showing the characteristic greenish-gray coloration of magnesium-rich pyroxene. These fragments originated as crystallized magma deep within Vesta's interior, later excavated and mixed through violent impact gardening of the asteroid's surface.

The polymict nature becomes evident in the varying crystal sizes and textures between adjacent clasts. Some fragments preserve coarse-grained plutonic textures from slow cooling at depth, while others show finer crystallization patterns. The matrix binding these fragments consists of crushed diogenitic material, lithified through impact compression and heating. This assemblage records the cumulative effect of countless impacts that have processed and reprocessed Vesta's crustal material over 4.5 billion years.

Scientific context

Diogenites represent the deepest crustal samples from asteroid 4 Vesta, the second-largest body in the main asteroid belt. These rocks crystallized from magma chambers several kilometers beneath Vesta's surface during the asteroid's early differentiation. The Dawn spacecraft mission confirmed the connection between HED meteorites and Vesta through spectroscopic mapping and geochemical analysis, making diogenites among the few meteorite types with a confirmed parent body.

The polymict classification indicates this specimen formed through impact brecciation on Vesta's surface, where collisions mixed fragments from different depths and locations within the diogenitic crust. NWA 17918 was classified in 2025, making it one of the most recently recognized members of the diogenite group. Study of such specimens helps planetary scientists understand the internal structure of differentiated asteroids and the processes that have modified their surfaces over billions of years. For broader context on meteorite identification and classification, see our guide on How to Tell if a Rock is a Meteorite.

Frequently asked questions

Is this meteorite authenticated? Yes, NWA 17918 is officially classified as diogenite-pm by the Meteoritical Society. You can verify this classification through the Meteoritical Bulletin entry: NWA 17918. This specimen includes a certificate of authenticity documenting its classification and provenance.

What does polymict (pm) mean? Polymict refers to a breccia containing fragments from multiple source rocks or locations. In this diogenite, polymict texture indicates that impacts on Vesta's surface mixed clasts from different depths or regions within the diogenitic crust, then lithified them into a single rock. The "pm" designation distinguishes this from monomict diogenites, which contain fragments from a single source.

What is included with this specimen? You receive the 13.33g polished end cut and a certificate of authenticity. No display stand is included.

Why is the HED-Vesta connection scientifically important? HED meteorites are the only achondrite group with a confirmed asteroidal parent body, verified by NASA's Dawn mission data. This connection allows scientists to study Vesta's geology through laboratory analysis of meteorites while comparing results to spacecraft observations, providing unique insights into asteroid differentiation and crustal evolution.

How should I display a polished end cut? The polished face shows the internal structure best when viewed flat or at a slight angle under good lighting. Many collectors use small acrylic easels or lean the specimen against a backdrop to showcase both the polished surface and the natural exterior edge.

Collector significance

Diogenite-pm specimens occupy a specialized niche in HED collecting, representing the deepest crustal material from Vesta available to private collectors. Only 74 meteorites carry the diogenite-pm classification, making this subtype substantially rarer than eucrites or howardites. The 13.33g mass provides sufficient size to appreciate the clast structure while remaining accessible compared to larger museum-grade pieces.

The 2025 classification date places NWA 17918 among the newest diogenite additions to the Meteoritical Bulletin, offering collectors an opportunity to acquire recently classified material. The polished preparation reveals structural details invisible on uncut specimens, making this format particularly valuable for collectors focused on understanding impact processes and asteroid geology. This specimen fits well in collections emphasizing Diogenites or broader HED Meteorites representing all three components of Vesta's differentiated crust.

Meteoritical Bulletin entry: NWA 17918 | Classification: Diogenite-pm | Find, Algeria, 2025

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SKU: 98224296542

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4.2 ★★★★★
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Carrie
Pawtucket, US
★★★★★ 1
Not a vine review of free product I paid for mine
I was super excited about this launcher for my little Chihuahua who thinks playing fetch all day everyday rain or shine. Is the reason for our existing lol. I thought I'll upgrade our Dollar store awesome score many yrs ago, he deserves that. (It too came with a ball still a $1.25) Total complete let down the ball launches straight into the ground or his back. even better the ball just won't release. I have tried the ball that came with,another tennis ball, his rubber ones, no luck I have had to dramel and shave the inside of the scoop out so ball will release properly. Even then ball can't sit properly just barely grab it. Yes I have tried different throwing techniques move my hand up more quick snap of wrist . Bottom line I don't want to have to spend my time or his trying to master this ball thrower. I have put in a drawer cause of the nice fold up feature and we will stick with our Dollar store old reliable that would out launch this one any day. ***An update 5/16/26 I was super shocked AllForPaws contacted me with full refund offer. I was not at all expecting that nor was my intention of the review. 5 stars I wld give them their customer service 150% made up for the toy that has unfortunately ended up at Sunnyside Daycare. We will definitely be giving ALL FOR PAWS a second chance, Thank you so much
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Reviewed in the United States on May 9, 2026
M
Mandy
Alexandria, US
★★★★★ 5
Foldable Design Works Great and Dog Goes Crazy for It
This ball launcher has become an instant hit in our household. The moment I pick it up, my dog is at the door wagging with excitement, which says everything about how much fun this toy brings to playtime. The foldable design works smoothly with a simple push button mechanism at the joint. Press the button and flick your wrist to extend it, or unfold it by hand if you prefer. When folding it back, it snaps securely into place. The mechanism feels solid and I expect it to hold up well with regular use. The only way I could see damaging it would be accidentally overextending it when locked open, but with normal handling it seems built to last. At 25 inches extended, this launcher gives serious throwing distance compared to what I can achieve by hand. The grip is extremely comfortable, genuinely reminiscent of a tennis racket handle with its soft, non-slip texture. Even during longer play sessions, my hand never gets tired or uncomfortable. The ball pickup feature works well too. With the 25-inch length, I do need to bend my knees slightly into a small squat for best results, but it beats bending all the way down and dealing with slobbery tennis balls by hand. The included 2.5-inch ball is smaller than a standard tennis ball, which actually makes this suitable for a wider range of dogs, including smaller breeds, not just medium and large dogs. I tested it with other 2.5-inch balls I had on hand and they worked just fine in the launcher. The ball stays secure during swinging and walking, so no worries about it falling out unexpectedly. The bright orange and blue colors make the ball easy to spot in grass or other outdoor settings. The launcher arrives ready to use right out of the box. It's convenient for storage and travel when folded, and the overall construction feels durable enough for regular outdoor use. If you want to increase throwing distance, keep your hands clean, and make fetch more exciting for your dog, this is a solid choice that delivers on its promises.
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Reviewed in the United States on December 26, 2025
B
Barb
Omaha, US
★★★★★ 3
Thrower is great, ball lasted an hour
The thrower is made of strong plastic. It is nicer than some of the others I have had because it can fold in half to store easier. There is a push button to open it and close it so it doesn’t collapse when using it. The ball cup has a slot in it which I feel helps the ball come out easier. The ball has a soft covering and while my dog didn’t chew the covering off, the ball inside cracked within an hour of her playing with it. Luckily, her other balls fit in the thrower.
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Reviewed in the United States on January 22, 2026
S
Sandydandy
Omaha, US
★★★★★ 5
Great!
This dog ball thrower is sturdy and easy to use, especially for longer throwing sessions. The length helps keep hands clean, and it launches balls smoothly without much effort. The foldable design makes it easier to store or bring along. After plenty of use, it’s held up well and hasn’t cracked or loosened. Our German shepherd pups are LOVING the further distance throws! It’s made fetch easier on arms and shoulders, and it works reliably.
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Reviewed in the United States on January 15, 2026
H
Hannah
Alexandria, US
★★★★★ 5
My dog is obsessed with this
My dog absolutely loves this ball launcher. The second it comes out he knows it is time to play and gets so excited. It makes throwing the ball much easier and sends it way farther than I can throw on my own, which is perfect for burning off energy at the park. I really like that I do not have to pick up a slobbery ball with my hands. Scooping it up is quick and easy and keeps my hands clean. The handle is comfortable to hold and does not slip, even during longer play sessions. The foldable design is a nice bonus and makes it easy to toss in the car or store when we are done. Overall this has been a big hit in our house and has made fetch even more fun for both of us.
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Reviewed in the United States on December 18, 2025

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