They are not simple and common rocks.
These are small volcanic fragments that are part of the monitoring of the authorities on the Spanish island of La Palma.
Learn more about this finding in the following video.
Look at the volcanic fragments that are appearing on La Palma | Videos | CNN
2022-02-24T03:04:38.814Z
They are not simple and common rocks. These are small volcanic fragments that are part of the monitoring of the authorities on the Spanish island of La | World | CNN