SKU: 49724578726

Denader 004 Bencubbinite CB Carbonaceous Chondrite Endcut 3.12g

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Description

Denader 004 Bencubbinite CB Carbonaceous Chondrite Endcut 3.12gOne of nine approved CB carbonaceous chondrites Denader 004 belongs to a group with only nine approved members in the Meteoritical Bulletin. It is a metal rich carbonaceous chondrite of the Bencubbin type, built from kamacite metal nodules set in a silicate groundmass of barred and radial chondrules. This specimen is a 3. 12 gram endcut, sliced to open the full interior. The cut face is studded with rounded metal nodules, each ringed by a thin iron

One of nine approved CB carbonaceous chondrites

Denader 004 belongs to a group with only nine approved members in the Meteoritical Bulletin. It is a metal-rich carbonaceous chondrite of the Bencubbin type, built from kamacite metal nodules set in a silicate groundmass of barred and radial chondrules. This specimen is a 3.12 gram endcut, sliced to open the full interior.

The cut face is studded with rounded metal nodules, each ringed by a thin iron hydroxide rim, against a pale gray brecciated matrix flecked with chondrule and mineral fragments. The metal runs through a weathering gradient from silvery to dark to orange limonite, a record of the time the stone spent in the Malian desert before recovery.

What sets this piece apart inside an already small group is the classification itself. A. Greshake could not place Denader 004 in either established CB subgroup. Its silicate fraction, the size of its chondrules, and a fine grained matrix sit it between CBa and CBb, leaving it classified simply as CB.

Structure and features

The cut and polished face presents both halves of the CB texture. Kamacite metal nodules, rounded to slightly elongated and averaging close to 2.5 millimeters across, make up roughly 40 percent of the surface and take a bright reflective polish. The remaining 60 percent is a gray silicate groundmass built from radial and finely barred chondrules up to 4 millimeters wide, broken chondrule and mineral fragments, and a fine grained matrix. Many of the metal nodules carry a thin brown iron hydroxide rim from the meteorite's time in the desert, and small rounded voids mark places where loose metal spheres weathered out. As an endcut, the piece keeps one fully prepared face for viewing while the reverse holds its natural exterior.

Discovery and provenance

Denader 004 was found during a search in Mali in 2025 and purchased from a local dealer near Gao. It was classified by A. Greshake at the Museum für Naturkunde in Berlin and published in the Meteoritical Bulletin, no. 115. The type specimen is held at the Museum für Naturkunde, with the main mass recorded to Jared Collins. The meteorite is listed as a find with low shock and moderate weathering.

Scientific context

CB chondrites, named for Bencubbin, are a metal-rich branch of the carbonaceous chondrites. Their metal and chondrules are interpreted to have formed from a vapor and melt plume thrown up by a high energy collision between early planetary bodies, rather than by the slow condensation that produced most chondrites. That origin is why CB material is dominated by metal nodules and by chondrules with radial and barred textures. The Meteoritical Bulletin entry classifies Denader 004 as CB but does not place it in either established subgroup: a silicate abundance near 60 percent, chondrules reaching 4 millimeters, the presence of a fine grained matrix, and the occurrence of zoned olivine together with ferroan pyroxene do not allow an unambiguous assignment to CBa or CBb. The dominant silicates are enstatite and forsterite, and the metal is a nickel bearing kamacite carrying chromium bearing troilite inclusions.

Frequently asked questions

What is a CB chondrite?
It is a metal-rich carbonaceous chondrite of the Bencubbin type, defined by abundant metal nodules and chondrules. CB chondrites are among the least common carbonaceous groups, with only nine officially classified to date.

Why is Denader 004 not labeled CBa or CBb?
The Meteoritical Bulletin notes that its high silicate content, large chondrules, fine grained matrix, and zoned olivine plus ferroan pyroxene do not fit cleanly into either recognized subgroup, so it is classified as CB without a subgroup.

Will the metal respond to a magnet?
Yes. The nodules are kamacite, a nickel iron metal, so the piece is strongly magnetic.

How should the endcut be stored and handled?
Handle it with clean gloves and keep it in a dry environment. Because it is a moderately weathered desert find that contains metal, low humidity helps protect the cut face and limits further rust.

Why this matters to a collection

CB chondrites record a violent moment in the early solar system, preserving metal and silicate that came together in an impact plume around 4.56 billion years ago. With only nine names classified as CB, the group is seldom offered, and a prepared endcut shows both a full polished face and the natural exterior of the stone. This specimen is offered by Treasure Coast Meteorite Co., IMCA Member #3323.

Classification and provenance for this specimen follow the official Meteoritical Bulletin entry for Denader 004, viewable at the Meteoritical Bulletin Database. Unless specifically stated in titles and descriptions, all meteorites sold by Treasure Coast Meteorite Co. are scientifically classified specimens with Meteoritical Bulletin citations.

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SKU: 49724578726

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4.6 ★★★★★
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A
Verified Purchase
Amazon Customer
Waukegan, US
★★★★★ 5
I wish I had read this sooner.
Format: Kindle
This book helped not only my discipline strategies but my faith. I didn’t even realize that I was not raised in a grace-based discipline approach. I’m so thankful that this book helped to convict me on a few things so I can show my daughter God’s love for her more clearly. I loved her humor. Made it actually really enjoyable to read! Her details are what really helped me. I am the kind of person who learns best from specific examples; this book has some good ones. I loved that there weren’t any muddy concepts and it didn’t get too theoretical type so I could actually understand.
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Reviewed in the United States on September 18, 2019
L
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LAM
Dallas, US
★★★★★ 5
Excellent resource for Christian parents raising the next generation!
Format: Paperback
I am currently researching and reading materials for a book I’m writing regarding how to build a strong foundation in children before the age of 10. I’ve read quite a few books so far, and I have to say one of my favorites is Grace Based Discipline. The author has done an excellent job, and and her witty humor makes this an enjoyable read! Because of this book, I am ordering the other books that her and her father have written!
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Reviewed in the United States on March 29, 2020
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Ashley
Draper, US
★★★★★ 5
Finally, a practical parenting book!
Format: Kindle
Prior to reading this book, I didn’t feel confident in my approach to discipline. I would read parenting advice from different sources and sway back and forth from one extreme to the other—overly strict to too lenient. The approach of grace based disciple is balanced. The author recognizes that children will act like children and we shouldn’t expect them all to act like little robots. However, they still need discipline (not punishment!) for their misbehavior. She gave very practical lists of what consequences work best at each age and for each personality type, and went beyond that to say how to truly address the deeper issues associated with the misbehavior. If you are wondering about her view on spanking (because most authors take a very strong stance on this) I think this book is very beneficial no matter which camp you are in. In the appendix, the author addresses spanking in a nonjudgmental way. She gives cautions if you decide to use spanking, and gives cautions if you decide not to use it. My only criticism of this book is that one chapter talks about how we need to recognize the “home country” (personality) of each member of our household and she suggests using an assessment to determine what “country” your child is from. However, you must pay separately for the assessment and it isn’t cheap. This idea of what “country” you and your children are from is referenced again and again in the book so I feel like it should have been included in the appendix. However, this book is still worth it. Don’t let that keep you from buying it.
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Reviewed in the United States on June 29, 2018
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E Tolentino
Louisville, US
★★★★★ 3
Mixed feelings
Format: Paperback
I had the opportunity to finish this book in one day of reading, while my 3 kids spent the day with grandparents. It is a very easy read, very accessible. Karis' style is very informal and she employs a lot of humor (and hyperbole), and that may be refreshing for some, though I found it distracting. I hope my criticisms will not be taken too harshly, and am certainly glad that others have found it inspiring or enlightening! We desperately need more grace based parenting in our homes and churches as we strive to undo the influence and damage of the punitive methods that have marred the face of Christian culture for so long! We need more books like this, that can reach every believing parent where they are, and inspire them to parent with the same grace and wisdom our Heavenly Father employs! All that said, this was my experience reading the book: I felt the numerous anecdotes take up valuable space and time that would be better spent digging into passages of the Word and working through practical application. I was disappointed to not find a whole lot of either. If you are well-read on child development and "alternative" methods of discipline and childrearing (from those considered to be in the "anti-spanking camp"), you will find nothing new here. I didn't care for the rebranding of the classic four temperments and promoting supplemental Family Matters products... You can easily find many free tools and information reguarding personality psychology on the internet, and you will have a much deeper understanding. But personality is a shifty thing in youth anyway, and if you are not inclined to pursue that kind of study, I promise that simply resolving to spend more unstructured time with your children, to slow down and observe them at work or play, to listen with full attention, considering their perspective before answering or judging, you will learn more than what could ever be summerized in a personality type. Pegging a child in any brand of personality typing has it's own drawbacks. It can promote unfair assumptions, lead to misunderstandings, and cause confusion when trying to understand more subtle or complex behaviors and attitudes. I appreciate her reasoning for not digging into the spanking issue in the main content of the book, setting that aside in the appendix in the back. She does a good job highlighting what gracious spanking looks like if you choose to do so. I am of a similar opinion that it is not a crucial point of doctrine and isn't always an issue of abuse or neglect either. It truly is a parent's prerogative and responisibility to consider the Word and the research and their own consience on the matter. If you do spank, follow her guidelines and you will not go wrong! I did find her characterizations of non-spankers, like myself, a bit condescending ("lazy", "fearful"), but to be fair she is addressing the extreme. If only you knew how much effort and time in research and reflection many of us sacrifice to employ better methods! It is very proactive approach and it is difficult work! I think she could have done a better job to include an objective summery of arguments in both camps for better understanding, but I really appreciate her exhorting those in both camps to avoid contention and judgement. It should never be an issue that causes us to break fellowship with a brother or sister! There is a good chapter on what she calls the "3 P's", a helpful framework for discerning the whole truth of God's word. But as far as parenting goes, personally, I didn't find anything new or particularly helpful here. I will be gifting this to a good friend/newer mom who will likely get more out of it than I did. Maybe you will too!
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Reviewed in the United States on July 24, 2018
J
Verified Purchase
J. M. Magrini
Natrona Heights, US
★★★★★ 5
Excellent, succinct, intro to Marxism...
Format: Paperback
Richard Wolff’s Understanding Marxism is an excellent and highly accessible populist work that introduces Marx’s critique of the inherent contradictions and inevitable problems that plague – and will continue to plague – capitalism. So, he sets out to show how the contemporary experience and understanding of the relationship between employer-employee emerge from because it is the modern manifestation of the historical distinction, which is hierarchical, oppressive and ultimately “exploitative, between master-slave and Lord-serf - Zizek, in his small text The Relevance of the Communist Manifesto, offers a unique response to this line of critique and reasoning. Above I mention the accessibility of the writing – in fact, there is a crystalline clarity to it - and if you have watched Wolff’s show or listened to his interviews, it’s as if Wolff is speaking in his usual manner that avoids academic jargon and communicates his ideas directly. This is an extremely helpful and useful guide to understanding Marx, and I am hoping many young intelligent politically-minded university students will read it – e.g., those who might be unfamiliar with Marx - because it offers a sensible corrective to the ill-informed Marxist critics on the so-called “intellectual dark web” (IDW) who repeatedly, without properly understanding Marx, scapegoat him and employ him as a bogeyman to enhance the arousal of fear and alarm with their rhetoric. Ultimately, and here I agree with Wolff, Marx might be said – bound intimately with Marx’s notion of “species being” (a term Wolff avoids) – to show why “ending exploitation [is] necessary to actualize social commitments to liberty, equality, brotherhood, and democracy” (36-37). So, instead of a utopian (end-of-history) communist or socialist model for society, Wolff, through his reading of Marx, offers what might be termed a philosophical or even commonsensical (and achievable!) model of what a more socially aware and humanly grounded workplace might look like – one that is Marxist in nature and instantiates people coming together in more “democratic, egalitarian ways.” (71). Wolff also directs readers to primary source material for further study - so, all the quotations included are traced to Marx's original writings, which readers are encouraged to seek out. To conclude, readers must be aware that this pamphlet – indeed, this is what Wolff calls it – does not attempt to serve as a broad or sprawling introduction to Marx and his writings. Thus, when ordering it, be aware that it is not akin to academic introductions and critiques of Marx such as Peter Singer’s Marx: a Very Short Introduction (OUP) or Allen Wood’s Karl Marx (Routledge).
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Reviewed in the United States on May 20, 2019

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