Cinder

A cinder is a pyroclastic material. Cinders are extrusive igneous rocks; they are fragments of solidified lava. Cinders are typically brown, black, or red depending on chemical composition and weathering. Cinders are similar to pumice.

For material that results from incomplete combustion of coal or wood, see Ember.
For other uses, see Cinder (disambiguation).
Not to be confused with sinter.
Example of a cinder, found at Amboy Crater
Volcanic eruptions such as this one can create cinders.
Volcanic cinder in the Mount Cayley volcanic field, British Columbia, Canada
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