Flint from Norfolk United Kingdom

Flint from Norfolk, which is very dark blue to black in colour. It is a lovely material, very hard, often used locally as a building material and in the past used as tools. I'm more than happy for the use of this model for free, but I would be very interested to know how it is used and if there are any improvements I can make. Thanks Chris. Source: Objaverse 1.0 / Sketchfab