Clovis knappers worked primarily with high-quality cryptocrystalline stone — types like chert, flint, obsidian, and jasper that have the right combination of hardness, homogeneity, and fracture characteristics that allow controlled flaking.

The Anzick artifacts include pieces made from stone that came from sources at varying distances from the burial site, indicating that the Clovis people who deposited these objects had either traveled extensively or had access to exchange networks that brought high-quality stone from across a large area.

The bifaces in the Anzick assemblage — unfinished tools at various stages of preparation — are equally significant.

They represent the Clovis strategy of carrying stone in partially prepared form, reducing the initial weight of transport while preserving the flexibility to produce finished tools as needed.