alumstones
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Example Sentences
Example:Ironstone and alumstones can sometimes be found in the same geological deposit.
Definition:a type of sedimentary rock that contains a high proportion of iron oxide
From ironstone
Example:Pelite is a broader term that can include substances like alumstones under certain conditions.
Definition:any of various fine-grained sedimentary rocks such as shale or sandstone
From pelite
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