Chocolate' flint : 2D documentation Upper Jurassic (Oxfordian/Kimmeridgian)
Chocolate' flint : 3D documentation Upper Jurassic (Oxfordian/Kimmeridgian)
object fragment (Brześć Kujawski) - metallographic analysis Neolithic
object fragment (Brześć Kujawski) - chemical analysis Neolithic
object fragment (Brześć Kujawski) - chemical analysis Neolithic