Foto de stock - Chert or silex is a cryptocrystalline or microcrystalline sedimentary rock composed of quartz. This sample comes from Tarragona, Catalonia, Spain.

Imagen: Chert or silex is a cryptocrystalline or microcrystalline sedimentary rock composed of quartz. This sample comes from Tarragona, Catalonia, Spain.

Criterios de búsqueda