The crystal skulls are human skull hardstone carvings made of clear or milky white quartz, claimed to be pre-Columbian Mesoamerican however, none have been authenticated as pre-Columbian.

The British Museum

The crystal skulls are human skull hardstone carvings made of clear or milky white quartz, claimed to be pre-Columbian Mesoamerican however,
none have been authenticated as pre-Columbian. (Wikipedia)

The crystal skulls are human skull hardstone carvings made of clear or milky white quartz, claimed to be pre-Columbian Mesoamerican however, none have been authenticated as pre-Columbian.

The crystal skulls are human skull hardstone carvings made of clear or milky white quartz, claimed to be pre-Columbian Mesoamerican however, none have been authenticated as pre-Columbian.

The crystal skulls are human skull hardstone carvings made of clear or milky white quartz, claimed to be pre-Columbian Mesoamerican however, none have been authenticated as pre-Columbian.