Specimen Record TC-00043

Specimen Record
TC-00043

Gyarub Zangbo · Pallasite, ungrouped · 84.69 g

This page is the permanent record for the specimen bearing serial TC-00043. It is issued by Treasure Coast Meteorite Co. as a reference for present and future owners. The photographs below show this specific specimen and are the primary means of verifying it.

Identification

Serial
TC-00043
Meteorite
Gyarub Zangbo
Classification
Pallasite, ungrouped
Weight
84.69 g
Form
Slice, polished both faces
Find location
Xizang, China. Recorded coordinates 33.126°N, 87.079°E.
Surface
Both faces polished and etched, with a thin protective epoxy applied to stabilize the olivine.
Shock stage
Low
Weathering grade
Low

Classification record

Published in
Meteoritical Bulletin 110 (2022) as Pallasite. Reclassified as Pallasite, ungrouped in Meteoritical Bulletin 114 (2026). Approved 13 March 2021.
Classifier
A. Irving, UWS, and P. Carpenter, WUSL
Type specimen
120 g including two polished end cuts at UWB.
Total known weight
17.61 kg as indexed from MB 110. The MB 114 writeup states the updated total mass is now more than 200 kg.
Main mass
Ziyao Wang
Approved count
One of 17 approved meteorites classified as Pallasite, ungrouped, as recorded in the Meteoritical Bulletin database in September 2026.

Provenance

The Meteoritical Bulletin records that Gyarub Zangbo was found in October 2020 by G. Tulga during exploration of the uninhabited Qiangtang region of the Qinghai-Tibet Plateau, northeast of the Gyarub Zangbo river in Xizang, China. Many disaggregated fragments of olivine and metal were recovered together with a larger metal-rich mass nearby. All of the material was purchased by Ziyao Wang in October and November 2020, and the Bulletin records the main mass as being with him. The working names recorded in the Bulletin are WZY-01 and WZY-10.

This slice was acquired by Treasure Coast Meteorite Co. It is not the main mass and is not the type specimen. The polished faces carry a thin protective epoxy, applied to stabilize the olivine and slow oxidation, which is standard practice for pallasite preservation and is disclosed here as a treatment.

Photographic record

Gyarub Zangbo ungrouped pallasite slice, 84.69g, polished and etched face, specimen record TC-00043
One polished face of the slice on a display stand, showing olivine set in the etched iron-nickel matrix.
Reverse face of the Gyarub Zangbo pallasite slice, 84.69g, specimen record TC-00043
The reverse face. The olivine distribution differs between the two faces, as expected in a slice cut through a coarse aggregate.
Backlit Gyarub Zangbo pallasite slice, 84.69g, translucent olivine, specimen record TC-00043
The full slice backlit, showing which olivine crystals transmit light. The pattern of lit crystals is individual to this slice.
Macro of etched metal in the Gyarub Zangbo pallasite, 84.69g, specimen record TC-00043
Macro of the metal between olivine crystals, showing the fine crosshatched etch pattern produced by the intergrowth of kamacite and taenite.
On verification. The serial number on the accompanying certificate card is an index to this record. The photographs above and the stated weight are what identify this specimen. Olivine distribution and cut faces are individual to each slice, so a specimen can be compared directly against these images and weighed against the figure recorded here to two decimal places.
Record issued by Treasure Coast Meteorite Co., IMCA Member #3323, Hobe Sound, Florida.
Issued 15 September 2026. Classification data reproduced from the Meteoritical Bulletin entry cited above.
Questions regarding this record may be directed to brian@tcmeteorites.com.