Allende CV3 Carbonaceous Chondrite. The meteorite exploded in the air in a brilliant fireball and scattered thousands of pieces over an area 30 miles long. The total known weight is over two tons. When the main mass exploded, the individual fragments continued to burn and thus they exhibit a nice primary and secondary fusion crust.
Most Allende stones have areas of missing fusion crust probably due to spalation.
This is caused by the stones hitting each other while still falling. You can clearly see this in the photos below. Allende is starting to get hard to get. Prices are rising on this meteorite.