Isna vs Vigarano

Isna is a carbonaceous chondrite meteorite of the CO3 group discovered in Egypt. Like other CO chondrites, it is characterized by a fine-grained matrix, small type I chondrules, and abundant metal. Meteorites of this classification are studied by planetary scientists to understand the early solar system and the formation of carbon-rich asteroids.

Vigarano is a CV3 carbonaceous chondrite meteorite that fell near Vigarano Mainarda, Italy, in 1910. It gives its name to the CV, or Vigarano-type, group and contains chondrules, metal, and abundant calcium-aluminum-rich inclusions. These refractory inclusions are among the oldest dated solids formed in the solar system, making Vigarano relevant to research on its earliest materials and conditions...