Sinawan 005 Rumuruti Meteorite Slice, R5-6, 22.16g, Dual Lithology Zones
SKU: 44816282916

Sinawan 005 Rumuruti Meteorite Slice, R5-6, 22.16g, Dual Lithology Zones

Sale price$139.50 Regular price$155.00
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Sinawan 005 Rumuruti Meteorite Slice, R5-6, 22.16g, Dual Lithology ZonesDual lithology specimen from one of Earth's rarest meteorite groups This 22. 16g slice of Sinawan 005 preserves two distinct lithological zones in a single stone, light and dark regions recording different stages of parent body metamorphism. The boundary between these zones runs diagonally across the face, creating a visual record of the complex thermal and impact history that characterizes R5 6 chondrites. Partial fusion crust along one edge marks

Dual lithology specimen from one of Earth's rarest meteorite groups

This 22.16g slice of Sinawan 005 preserves two distinct lithological zones in a single stone, light and dark regions recording different stages of parent body metamorphism. The boundary between these zones runs diagonally across the face, creating a visual record of the complex thermal and impact history that characterizes R5-6 chondrites. Partial fusion crust along one edge marks its atmospheric entry path over Libya in 2023.

The dual lithology structure suggests either brecciation from impact events on the parent body, or variable metamorphic grades within a single host rock. Both zones show the oxidized mineralogy typical of Rumuruti chondrites, high olivine content with elevated ferrous iron compared to ordinary chondrites. This specimen represents the complete slice, preserving the full transition between lithological domains.

Structure and features

The lighter lithological zone occupies roughly 60% of the face and displays a finer-grained matrix with scattered chondrule relicts, consistent with the type 6 metamorphic grade. The darker zone shows coarser crystallization and more pronounced grain boundaries, reflecting thermal processing at the type 5 boundary. Where the two zones meet, no sharp contact exists, the transition occurs over several millimeters, suggesting gradational metamorphic conditions rather than mechanical mixing.

Small rounded chondrules remain visible in both zones despite the moderate to high metamorphic grade. These range from 0.3 to 1.2 millimeters in diameter and appear as subtle textural variations against the surrounding matrix. The fusion crust displays the characteristic black glassy surface formed during atmospheric deceleration, with flow lines indicating the stone's orientation during flight.

Scientific context

Rumuruti chondrites constitute less than 0.5% of all classified meteorites, making them among the rarest chondrite groups in collections worldwide. Their parent body remains unidentified, though spectroscopic studies have attempted to link R-chondrites to several near-Earth asteroids without definitive confirmation. The group takes its name from the Rumuruti meteorite that fell in Kenya in 1934, establishing the classification for this distinct oxidized chondrite family.

The R5-6 designation indicates metamorphic conditions near the transition between type 5 (where chondrules are still clearly defined) and type 6 (where chondrule boundaries become obscured by recrystallization). Only three specimens of Sinawan 005 have been classified and distributed globally, with this stone representing one complete slice from the original recovered mass. Learn About Meteorites provides additional context for understanding chondrite classifications and metamorphic grades.

Frequently asked questions

Is this meteorite authenticated? Yes. Sinawan 005 is classified in the Meteoritical Bulletin as Rumuruti (R5-6). You can verify this classification at Sinawan 005. This specimen includes a certificate of authenticity from Treasure Coast Meteorite Co.

What does dual lithology mean in this context? Dual lithology refers to the presence of two distinct textural and compositional zones within a single meteorite. In Sinawan 005, these zones likely formed from different metamorphic conditions on the parent body or represent fragments that were mechanically mixed during an impact event and later lithified together.

What makes Rumuruti chondrites chemically distinct? R-chondrites contain olivine with significantly higher FeO content than ordinary chondrites, typically 38-40 mole percent fayalite. They also show higher bulk oxygen content and different oxygen isotope ratios, placing them on a separate formation path from H, L, and LL ordinary chondrites.

What is included with this specimen? The listing includes the 22.16g slice and a certificate of authenticity. No display stand is provided.

How rare is a type R5-6 specimen? Extremely rare. Only three classified specimens of Sinawan 005 exist worldwide. Rumuruti chondrites as a group represent less than half of one percent of all meteorite falls and finds, and those showing dual lithologies are scarcer still.

Collector significance

Sinawan 005 offers access to one of meteorite science's most underrepresented groups. With only three known specimens in existence, this slice provides a tangible connection to a parent body that remains astronomically unidentified. The dual lithology structure adds visual and scientific interest beyond what typical Rumuruti specimens display, making this piece notable even among R-chondrites.

The 22.16g mass provides sufficient size for display while representing a complete cross-section through both lithological domains. Collectors focused on rarity metrics or completing representative samples across all chondrite groups will find few opportunities to acquire classified R5-6 material. This specimen bridges the gap between type 5 and type 6 metamorphic grades, documenting thermal evolution on a parent body that delivered less than 200 classified specimens to Earth across all recorded history. Browse additional rare chondrite classifications in our Chondrites collection.

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

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 44816282916

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.9 ★★★★★
Based on 2085 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
K
Verified Purchase
Katie
Omaha, US
★★★★★ 5
Great toddler backpack!
Size: Small, Color: All Black
My daughter is in prek 3 and loves this backpack. Nice and small for her to carry. A full folder will fit with a little force, but if you’re looking for something to actually carry folders and books, maybe not the best.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 28, 2026
M
Verified Purchase
Mick
Phoenix, US
★★★★★ 5
“Tiny Backpack, Big Personality!”
This little backpack is doing big kid things — and my toddler knows it. The second we strapped it on, he marched around like he was off to close a business deal with juice boxes in both hands. It’s the perfect size for tiny shoulders, and the chest buckle? GENIUS. No more slippy straps or bag-flinging tantrums. It stays put like a champ, even during epic playground sprints and spontaneous dance moves in the grocery store. The material is sturdy, the zippers glide like butter, and the reflective strip makes my toddler look like he’s ready for a baby night shift. The color combo is sleek — black and grey with just the right touch of “cool kid on campus” energy. Plenty of space for snacks, sippy cups, a favorite toy, and 14 mysterious pebbles he insisted on collecting “for science.” If your 2-4-year-old wants to carry their own stuff and look proud doing it — this is the backpack for them. Highly recommend (and yes, I already ordered another one for backup... because toddlers). 🎒
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 26, 2025
P
Verified Purchase
priscilla
Belleville, US
★★★★★ 5
Good! Recommend
Size: Small, Color: Pink Dino
My 2 year old loves this backpack. I love the snap in the front for additional support of the distribution of weight. It has a good size cup holders and the inside of the bag is very spacious.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 11, 2025
V
Verified Purchase
vkb
Natrona Heights, US
★★★★★ 5
A good buy especially for young kids
Our community is providing school supplies this year for an elementary school that we adopted. Backpacks are in big demand but, as you know if you’ve been shopping, pretty pricey. This backpack was a Prime-day find so I bought a couple of them but, even back to the regular price, it’s a good deal especially for very young kids. In person the backpack is cute and stylish with the vibrant range of colors you see in the product pictures. I bought the large backpack which, as you can see in the photo, is more than tall enough for a standard manila folder. The stitching seems sound and the straps work as you would expect; it also has two side pockets. If I had to pick a weak spot, I’d say it’s the zipper, especially the one on the front pouch. It’s not a problem at the moment but it’s nylon, not metal, and so I don’t expect it to last forever. But if it gets through one school year, I consider that good. I think it’s a pretty good buy if you’re on a budget.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 14, 2025
S
Verified Purchase
Solomon’s Mom
Natrona Heights, US
★★★★★ 4
Backpack Backpack
Size: Small, Color: Pink Dino
Cute, definitely a perfect size for my tall 3 yr old. (3’7”) I did have to let it air out though. Has a weird smell.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 31, 2026

recommand products