A stony meteorite containing no small mineral granules (chondrules).
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- Stones are divided into two main subcategories: chondrites and achondrites.
- It has been identified in carbonaceous achondrite and iron meteorites.
- There are a number of other achondrites that do not fit into any of the preceding groups or subgroups.
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- Stony-irons would then be samples from the boundary between the achondritic upper layers and the core.
- While still on the parent body, much of the achondritic material was formed by igneous processes similar to those occurring on Earth today.
- This means there are a lot of different groups and sub-types of iron meteorite and they can be related to both stony achondritic and chondrite meteorites.