SKU: 97631207065

Sinawan 005 Rumuruti Meteorite Slice, R5-6, 24.45g, Dual Lithology Zones

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Description

Sinawan 005 Rumuruti Meteorite Slice, R5-6, 24.45g, Dual Lithology ZonesTwo lithologies in a single slice This Sinawan 005 specimen preserves two distinct lithologies within one slice. A light toned zone and a darker zone meet at a sharp contact, representing different thermal or shock histories within the same parent body. The boundary between these regions cuts cleanly across the face, making the structural division immediately visible. At 24. 45g, this slice captures the full width of both zones in a single cross

Two lithologies in a single slice

This Sinawan 005 specimen preserves two distinct lithologies within one slice. A light-toned zone and a darker zone meet at a sharp contact, representing different thermal or shock histories within the same parent body. The boundary between these regions cuts cleanly across the face, making the structural division immediately visible. At 24.45g, this slice captures the full width of both zones in a single cross-section. Fusion crust fragments remain along portions of the edge, marking the original exterior surface of the meteorite.

Sinawan 005 is classified as R5-6, placing it at the thermal transition between type 5 and type 6 petrologic grades. This dual grading reflects heterogeneous heating within the Rumuruti parent body. The light zone shows characteristics of higher metamorphic grade, while the darker zone retains features of lower grade material. Both zones coexist because the parent body experienced uneven internal heating, possibly from impact or radioactive decay in localized regions.

Structure and features

The contact zone between the two lithologies is the defining structural feature. This boundary is not gradational but abrupt, suggesting that the two regions formed under different conditions and were later juxtaposed, likely through impact brecciation. Chondrule outlines are visible in both zones, though better preserved in the darker material. The lighter zone displays more recrystallized matrix, consistent with higher metamorphic alteration. Small metal grains are distributed throughout both lithologies, appearing as bright flecks against the silicate background.

The slice surface shows natural texture without artificial polish. This preserves the native contrast between the two zones and allows direct observation of the mineralogical differences. Fusion crust, where present, is thin and dark, typical of Rumuruti chondrites, which produce less pronounced crusts than ordinary chondrites due to their oxidized composition.

Scientific context

Rumuruti chondrites represent approximately 0.5% of all classified meteorites, making them one of the rarest major chondrite groups. They are named after the Rumuruti meteorite, which fell in Kenya in 1934. R chondrites are oxygen-isotope distinct from ordinary, carbonaceous, and enstatite chondrites, indicating they originate from a separate parent body. That body remains unidentified, though it likely resides in the inner asteroid belt based on orbital dynamics.

The R5-6 classification indicates that this meteorite experienced peak metamorphic temperatures between approximately 700°C and 950°C. This heating caused recrystallization of matrix minerals and partial equilibration of olivine and pyroxene compositions. The dual lithology structure suggests that different regions of the parent body reached different peak temperatures or cooled at different rates. Impact mixing later brought these zones together into a single rock. Learn About Meteorites to understand how petrologic types reflect thermal history.

Frequently asked questions

Is this meteorite authenticated? Sinawan 005 is classified in the Meteoritical Bulletin as Rumuruti (R5-6), found in Libya in 2023. The full classification details are available through the Meteoritical Bulletin database. This specimen includes a certificate of authenticity documenting its provenance and classification.

What does dual lithology mean in this context? Dual lithology refers to two distinct rock types present in the same specimen. In this slice, one zone shows higher metamorphic grade (lighter color, more recrystallization) while the other shows lower grade (darker, better-preserved chondrules). The sharp boundary between them indicates they were brought together by impact processes on the parent body, not by gradual transition.

What is included with this specimen? The specimen weighs 24.45g and includes a certificate of authenticity. No display stand is included.

Why is the R5-6 designation significant? The hyphenated grade (R5-6) indicates that this meteorite contains characteristics of both petrologic type 5 and type 6. This intermediate classification is less common than single-type assignments and reflects thermal heterogeneity within the parent body. It places the specimen at a key transition point in metamorphic evolution.

How rare is Sinawan 005 specifically? Only three specimens of Sinawan 005 have been classified and documented. This makes it exceptionally scarce even within the already-rare Rumuruti group. The meteorite has been the subject of published scientific research due to its unusual dual lithology structure.

Scientific importance and collector positioning

Sinawan 005 is one of three known specimens at this specific classification, making it scientifically significant beyond the inherent rarity of R chondrites. The dual lithology structure has been documented in peer-reviewed literature, confirming that this meteorite preserves direct evidence of thermal and impact processes on the Rumuruti parent body. Collectors seeking scientifically noteworthy specimens will find few opportunities more compelling than a meteorite with published research and documented scarcity at this level.

The slice format allows full observation of both lithologies in their natural contact relationship. This is not a polished display piece but a research-grade cross-section that reveals internal structure. The 24.45g size is substantial enough to show both zones completely while remaining accessible for private collections. Chondrites of this rarity and documented significance rarely appear on the collector market. This is one of three chances to own this specific find.

Meteoritical Bulletin entry: Sinawan 005 | Classification: Rumuruti (R5-6) | Find, Libya, 2023

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SKU: 97631207065

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NLB
Dallas, US
★★★★★ 5
Interesting
Format: Kindle
So I will say I enjoyed the story, for sure had its moments where it dragged but it was a great story. I really liked that omegas picked their alphas/make the pack. Normally the Alphas make it and the omega fits in with them which is great but I enjoyed this new version where all the power basically went to the omega. It was a nice change of pace. I can admit some of the weird bedroom stuff with her being pregnant was odd, it’s really not hard to do stuff when pregnant (I know I’ve had two and it’s normal and even encouraged at the end especially if you want the baby out). But I like the story as a whole and will read the second, I do hope the next one isn’t dragged bc it stopped being action or tense after she met her alphas and I don’t think it was brought up or properly done when they tried to do it. More sweet after she left.
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Reviewed in the United States on November 11, 2024
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Altairjones
West Palm Beach, US
★★★★★ 3
I’m a little disappointed.
Format: Kindle
I usually like Jillian West’s books but this one was missing a lot for me. The pregnancy didn’t come across as real. She’s on her feet for 12 hour days but is perfectly healthy at 8 months pregnant? Yet the week she moves in all of a sudden she’s not? She is planning on actually running during one of the plot buildups. But at 8 months pregnant that’s incredibly hard to do. The lack of breathing ability and lung space, the change in body center, mass, and gravity. All of it prohibits running, unless you’re an athlete this didn’t come off as at all realistic. I didn’t feel any connection with the alphas. There wasn’t any emotional connection. It could be because of the tense it was written in. But I didn’t get any deep feelings out of this. It came across as checking off boxes. Even the spicy scenes weren’t really believable for me. I wanted to see them fall for her, and it just kind of all fizzled. Even Bishop. One thing I did really like was the ending. I did not see it coming and I’m interested in reading book two because of it. But on the whole this book was mostly disappointing for me.
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Reviewed in the United States on March 16, 2024
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Melissa Williams
New York, US
★★★★★ 4
4.25 stars
Format: Kindle
Vale is an 8 month pregnant omega working as a waitress at a strip club and a cam girl. She starts to get very creepy vibes from a regular at the club, and her baby daddy ghosted her. She has had an online relationship with a man named Bishop through her cam girl status. One night, bishop was paying to watch her sleep and ansthe creepy regular Andrew break in and watch her sleep he tells vale to come to him at his business now. She flees and finds herself at a large security company with some.hot of alphas who are there to help her. This imegaverse is a little different than I have read, but I am thoroughly enjoying it. Vale is not a traditional omega she was raised by a single beta mom, and the alphas are not normal alphas they have never really loved pack life. But they are ruthless mercenaries. They need her, and she needs them. I love the aspect of the stalker and now the plot twists at the end, so so good. Sometimes, it seemed a little slow and stale mated, but since this a duet, I think It was just her starting to have Vale get to know her alpha suitors. Cliffhanger for sure with this one.
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Reviewed in the United States on September 9, 2024
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Austin & Cambria
Lowell, US
★★★★★ 5
That ending 😫
Format: Kindle
I fell into a false sense of security and really thought this was gearing towards a happy ending. Then I realized there’s no work they don’t punish Andrew. I really liked Vale’s character. I don’t normally read books with pregnancy but going into this knowing she was pregnant made it more enjoyable for me. I loved Bishops devotion to her and her happiness. I also loved that Holt and Mercy couldn’t fight their attraction to her. I love scent matches so very much. I’m so curious to see how this duet will end up. And I need to pay more attention and notice that a book I’m starting is a duet to begin with lol
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Reviewed in the United States on February 21, 2025
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Sarah A
Charlottesville, US
★★★★★ 5
oh wow
Format: Kindle
I just knew there was something about Cooper! I’m wondering if he’s about to be included but damn I’m glad he’s at least not a rapist and creepy guy, he just got called on assignment and had to go! This should be interesting! She’s gonna run and then what’s his face is gonna grab her. I’m worried! Wow that was a great book and cliffhanger! Loving this!
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Reviewed in the United States on December 27, 2025

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