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ALLENDE

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    Allende fell on 8 Feb 1969 near the town of Pueblito de Allende in Chihuahua, Mexico. It is a carbonaceous chondrite classified as a CV3.  Carbonaceous chondrites are among the most primitive of meteorites. They contain up to 4% carbon. The most distinctive characteristic of the CV meteorites is the presence of large irregular white inclusions. They are called CAIs (Calcium-Aluminum Inclusions). CAIs have been intensely studied.  Unusual isotopic ratios in the elements of these inclusions suggest that some of the material forming the CAIs came from preexisting interstellar grains  that mixed with the forming solar nebula. CAIs are certainly among the oldest material in the solar system.

        I have a number of Allende pieces, too many for one page.  Click on the following links for pictures and prices.

 

                 Complete individuals

         Slices and end cuts