Which description is true for the meteorite Siderite?

Siderite is indeed a type of meteorite that is primarily composed of iron, which supports the assertion that it contains a high percentage of this metal, close to 90% in certain cases. This iron-rich composition is characteristic of certain types of meteorites, particularly those classified as iron meteorites.

Additionally, the idea that siderite could originate from the crust of a former planet is well within the realm of scientific theory regarding the formation of meteorites. Many meteorites are thought to originate from the remnants of planetary bodies that have undergone significant geological changes, which allows for the possibility that siderite could come from a former planet's crust.

Furthermore, there have been notable examples of large siderite meteorite specimens, including some that weigh around 60 tons. For instance, one such specimen is located in Africa and is significant both for its size and for the insights it provides into the composition of celestial materials.

The accuracy of these descriptions confirms that each individual statement regarding siderite is valid and factual, thereby making the conclusion that all of the statements are true the most comprehensive choice.