| 21. | This mineral has been found in meteorites including irons and CV carbonaceous chondrites.
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| 22. | Only CV chondrites are more strongly enriched in magnesium.
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| 23. | It is a breccia, one of only five known enstatite chondrite breccias.
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| 24. | Their mineral composition lies between H and E chondrites.
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| 25. | Chondrite meteorites are classified using the oxygen isotope ratios.
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| 26. | Chondrites are often considered to be " the building blocks of the planets ".
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| 27. | However, no hydrated minerals were detected, suggesting no link with carbonaceous chondrites.
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| 28. | There are currently over 27, 000 chondrites in the world's collections.
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| 29. | The various chondrite groups likely originated on separate asteroids or groups of related asteroids.
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| 30. | From the carbonaceous chondrites, we follow the trail to the most primitive materials.
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